/ 2 \ (x + 4)*\x - 4*x + 16/
(x + 4)*(x^2 - 4*x + 16)
3 64 + x
64 + x^3
/ ___\ / ___\ 1*(x + 4)*\x + -2 + 2*I*\/ 3 /*\x + -2 - 2*I*\/ 3 /
((1*(x + 4))*(x - (2 + 2*i*sqrt(3))))*(x - (2 - 2*i*sqrt(3)))
(4.0 + x)*(16.0 + x^2 - 4.0*x)