x(x+1)
12xy^2 (2a^2-3xy^2)
2ax(a+3x)
2a^2 x+6ax^2
a^2+ab
b(a-1)
abc(1+c)
24a^2 xy^2-36x^2 y^4
3(2a+5b)
a(a+b)
abc+abc^2
ab-b
x^2+x
18p^3+p^2
2p^2
6a+15b
