x^3+a*x^2+b*x+c=0其解为（注意I为虚数单位）：x1=1/6*(36*b*a-108*c-8*a^3+12*(12*b^3-3*b^2*a^2-54*b*a*c+81*c^2+12*c*a^3)^(1/2))^(1/3)-6*(1/3*b-1/9*a^2)/(36*b*a-108*c-8*a^3+12*(12*b^3-3*b^2*a^2-54*b*a*c+81*c^2+12*c*a^3)^(1/2))^(1/3)-1/3*a;x2=-1/12*(36*b*a-108*c-8*a^3+12*(12*b^3-3*b^2*a^2-54*b*a*c+81*c^2+12*c*a^3)^(1/2))^(1/3)
+3
*(1/3*b-1/9*a^2)/(36*b*a-108*c-8*a^3+12*(12*b^3-3*b^2*a^2-54*b*a*c+81*c^2+12*c*a^3)^(1/2))^(1/3)-1/3*a+1/2*I*3^(1/2)*(1/6*(36*b*a-108*c-8*a^3+12*(12*b^3-3*b^2*a^2-54*b*a*c+81*c^2+12*c*a^3)^(1/2))^(1/3)+6*(1/3*b-1/9*a^2)/(36*b*a-108*c-8*a^3+12*(12*b^3-3*b^2*a^2-54*b*a*c+81*c^2+12*c*a^3)^(1/2))^(1/3));x3=-1/12*(36*b*a-108*c-8*a^3+12*(12*b^3-3*b^2*a^2-54*b*a*c+81*c^2+12*c*a^3)^(1/2))^(1/3)+3*(1/3*b-1/9*a^2)/(36*b*a-108*c-8*a^3+12*(12*b^3-3*b^2*a^2-54*b*a*c+81*c^2+12*c*a^3)^(1/2))^(1/3)-1/3*a-1/2*I*3^(1/2)*(1/6*(36*b*a-108*c-8*a^3+12*(12*b^3-3*b^2*a^2-54*b*a*c+81*c^2+12*c*a^3)^(1/2))^(1/3)+6*(1/3*b-1/9*a^2)/(36*b*a-108*c-8*a^3+12*(12*b^3-3*b^2*a^2-54*b*a*c+81*c^2+12*c*a^3)^(1/2))^(1/3));以上解绝对正确！我用maple解出来的。希望有人跟贴，写成一元四次方程的解。贴吧里“传说是四次方程的求根公式”我试了一下好像有些不对头。

我的公式在这个网页上是很难读清楚，但是会用的人自然会用。我想继续跟各位朋友请教一个问题，如果我想对一个高次多项式求反函数，有什么办法可以做到？当然是次数≥5次的。即便我知道这个多项式在某段区间上是单调的也不行吗？也就是说，如果我看到一段高次多项式形成的曲线，我永远没有绝对把握求出它的反函数（除了极个别可以分解因式之类的巧合情形之外）？高次方程不可直接求解〈=〉高次多项式反函数不可求？这个问题困扰我好一段时间了，盼答复，谢谢～～PS：我需要做的是对任意一个从十几到几十次的一元高次方程求反函数，需要maple或matlab的支持才能计算。

一元四次方程：S=solve('a*x^4+b*x^3+c*x^2+d*x+f','x')[ -1/4*b/a+1/12*3^(1/2)/a*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)+1/12/a*(-(-18*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)+48*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)+6*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96

*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-72*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*d*b*a+288*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*f*a^2+24*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*a*c^2+144*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*d*a^2+18*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*b^3-72*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*c*b*a)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f

*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)/((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2))^(1/2)][ -1/4*b/a+1/12*3^(1/2)/a*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)-1/12/a*(-(-18*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)+48*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-

48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)+6*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-72*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*d*b*a+288*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*f*a^2+24*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f

*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*a*c^2+144*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*d*a^2+18*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*b^3-72*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*c*b*a)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)/((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2))^(1/2)][ -1/4*b/a-1/12*3^(1/2)/a*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)+1/12/a*(-(-18*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2

*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)+48*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)+6*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-72*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*d*b*a+288*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*

c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*f*a^2+24*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*a*c^2-144*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*d*a^2-18*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*b^3+72*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*c*b*a)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)/((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2))^(1/2)]

[ -1/4*b/a-1/12*3^(1/2)/a*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)-1/12/a*(-(-18*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)+48*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)+6*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8

*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-72*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*d*b*a+288*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*f*a^2+24*((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2)*a*c^2-144*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*d*a^2-18*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*b^3+72*3^(1/2)*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)*c*b*a)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^

2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)/((3*b^2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)-8*c*a*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3)+2*(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(2/3)*a-24*d*b*a+96*f*a^2+8*a*c^2)/(-36*c*d*b-288*f*c*a+108*d^2*a+108*f*b^2+8*c^3+12*(81*d^4*a^2+12*d^3*b^3+12*d^2*a*c^3-3*d^2*b^2*c^2-48*f*a*c^4+384*f^2*a^2*c^2-54*c*d^3*b*a+12*f*b^2*c^3+240*b*d*f*a*c^2-432*f*c*a^2*d^2-432*f^2*c*a*b^2-768*f^3*a^3+81*f^2*b^4+18*b^2*d^2*f*a+576*b*d*f^2*a^2-54*c*d*b^3*f)^(1/2))^(1/3))^(1/2))^(1/2)]

http://post.baidu.com/f?kz=102454053

λ4-0.1984λ3-0.054735λ2-0.0007138λ-0.000098=0帮忙给个答案,多谢!!!

λ^4-0.1984*λ^3-0.054735*λ^2-0.0007138*λ-0.000098=0

请问，用这个公式能求出具体的解吗？比如，sin10度=？

若是三个都是实根怎么办？？？？？？？？？？

虚数项无限接近0

λ^4-0.1984λ^3-0.054735λ^2-0.0007138λ-0.000098=0λ = -0.153929, λ = -0.00317304 - 0.0420113i, λ = -0.00317304 + 0.0420113i, λ = 0.358675

能解下这个方程吗x ^ 3 + 2 * x ^ 2 + 3 * x + 4 = 0