/ ___\ / ___\ / ___ \ / ___\ (x + 2*I)*(x - 2*I)*\x + I + \/ 3 /*\x + -I + \/ 3 /*\x + - \/ 3 + I/*\x + -I - \/ 3 /
(((((x + 2*i)*(x - 2*i))*(x + i + sqrt(3)))*(x - i + sqrt(3)))*(x - sqrt(3) + i))*(x - i - sqrt(3))
/ 2\ / 4 2\ \4 + x /*\16 + x - 4*x /
(4 + x^2)*(16 + x^4 - 4*x^2)