3 x - 64
x^3 - 64
/ ___\ / ___\ (x - 4)*\x + 2 + 2*I*\/ 3 /*\x + 2 - 2*I*\/ 3 /
((x - 4)*(x + 2 + 2*i*sqrt(3)))*(x + 2 - 2*i*sqrt(3))
/ 2 \ (-4 + x)*\16 + x + 4*x/
(-4 + x)*(16 + x^2 + 4*x)
-64.0 + x^3