3 x - 7*x + 6
x^3 - 7*x + 6
1*(x + 3)*(x - 1)*(x - 2)
((1*(x + 3))*(x - 1))*(x - 2)
(-1 + x)*(-2 + x)*(3 + x)
6.0 + x^3 - 7.0*x