2x^2-22xy+48y^2
=2(x^2-11xy+24y^2)
=2(x-8y)(x-3y)
54y^3+2x^3z^6
=2(27y^3+x^3z^6)
=2(3y+xz^2)(9y^2-3yxz+x^2z^4)