3 2 4*x + 6*x
4*x^3 + 6*x^2
2 x *(6 + 4*x)
x^2*(6 + 4*x)
(x + 3/2)*x
2 2*x *(3 + 2*x)
2*x^2*(3 + 2*x)
4.0*x^3 + 6.0*x^2