5 4 18*y + 12*y
18*y^5 + 12*y^4
4 y *(12 + 18*y)
y^4*(12 + 18*y)
1*(x + 2/3)*(x + 0)
(1*(x + 2/3))*(x + 0)
12.0*y^4 + 18.0*y^5
4 6*y *(2 + 3*y)
6*y^4*(2 + 3*y)