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