3 x*(x - 1)
x*(x - 1*1)^3
1*(x + 0)*(x - 1)
(1*(x + 0))*(x - 1)
x*(-1.0 + x)^3
4 3 2 x - x - 3*x + 3*x
x^4 - x - 3*x^3 + 3*x^2