3 a + 8
a^3 + 8
/ ___\ / ___\ 1*(a + 2)*\a + -1 + I*\/ 3 /*\a + -1 - I*\/ 3 /
((1*(a + 2))*(a - (1 + i*sqrt(3))))*(a - (1 - i*sqrt(3)))
8.0 + a^3
/ 2 \ (2 + a)*\4 + a - 2*a/
(2 + a)*(4 + a^2 - 2*a)