4 a + 324
a^4 + 324
1*(a + 3 + 3*I)*(a + 3 - 3*I)*(a + -3 + 3*I)*(a + -3 - 3*I)
(((1*(a + (3 + 3*i)))*(a + (3 - 3*i)))*(a - (3 + 3*i)))*(a - (3 - 3*i))
324.0 + a^4
/ 2 \ / 2 \ \18 + a - 6*a/*\18 + a + 6*a/
(18 + a^2 - 6*a)*(18 + a^2 + 6*a)