4 2 - x + 2*x + 3
-x^4 + 2*x^2 + 3
4 2 3 - x + 2*x
3 - x^4 + 2*x^2
/ ___\ / ___\ \x + \/ 3 /*\x - \/ 3 /*(x + I)*(x - I)
(((x + sqrt(3))*(x - sqrt(3)))*(x + i))*(x - i)
3.0 - x^4 + 2.0*x^2
2 / 2\ 3 + x *\2 - x /
3 + x^2*(2 - x^2)
/ 2\ / 2\ -\1 + x /*\-3 + x /
-(1 + x^2)*(-3 + x^2)