3 a + 64
a^3 + 64
/ ___\ / ___\ 1*(a + 4)*\a + -2 + 2*I*\/ 3 /*\a + -2 - 2*I*\/ 3 /
((1*(a + 4))*(a - (2 + 2*i*sqrt(3))))*(a - (2 - 2*i*sqrt(3)))
64.0 + a^3
/ 2 \ (4 + a)*\16 + a - 4*a/
(4 + a)*(16 + a^2 - 4*a)