3 2 x - x + x - 1
x^3 - x^2 + x - 1
3 2 -1 + x + x - x
-1 + x + x^3 - x^2
(x - 1)*(x + I)*(x - I)
((x - 1)*(x + i))*(x - i)
/ 2\ \1 + x /*(-1 + x)
(1 + x^2)*(-1 + x)
-1.0 + x + x^3 - x^2
-1 + x*(1 + x*(-1 + x))