/ ___\ / ___\ | 2 2*I*\/ 3 | | 2 2*I*\/ 3 | 1*(a - 4/3)*|a + - + ---------|*|a + - - ---------| \ 3 3 / \ 3 3 /
((1*(a - 4/3))*(a + (2/3 + 2*i*sqrt(3)/3)))*(a + (2/3 - 2*i*sqrt(3)/3))
/ 2 \ -(-4 + 3*a)*\16 + 9*a + 12*a/
-(-4 + 3*a)*(16 + 9*a^2 + 12*a)