18mxy2 – 54m2x2y2 + 36my2 =
10b – 30ab2 =
6xy3 – 9nx2y3 + 12nx3y3 – 3n2x4y3 =
10a2 – 5a + 15a3 =
10b 1−3ab
18my2(x – 3mx2 + 2)
3xy3(2 – 3nx + 4nx2 – n2x3)
5a(2a – 1 + 3a2)
