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