Factor out the greatest common factor from the expression
9x^4y^4+7x^6y^3-12x^4y^3
Factor out the greatest common factor from the expression
1ox^2yz^3-6x^2y^2z-4xy^3z^2
Completely factor the expression
5x^2y + 30xy^2 + 45y^3
Completely factor the expression
18x^2-32y^2