18xz + 9yz + 3z
27x³y²z + 9xy³z²
2x²y - 2xy²z + 2x²y²
2x³ - 4x⁴ + 2x²
xyz-xy²z+xyz²
3z (6x + 3y + 1)
xyz (1 - y + z)
9xy²z(3x² + yz)
2xy(x - yz + xy)
2x² (x - 2x²+1)
