/ 2 \ (a + 2)*\a + 2*a + 4/
(a + 2)*(a^2 + 2*a + 4)
/ ___\ / ___\ 1*(a + 2)*\a + 1 + I*\/ 3 /*\a + 1 - I*\/ 3 /
((1*(a + 2))*(a + (1 + i*sqrt(3))))*(a + (1 - i*sqrt(3)))
3 2 8 + a + 4*a + 8*a
8 + a^3 + 4*a^2 + 8*a
(2.0 + a)*(4.0 + a^2 + 2.0*a)