[latex]y^{2} 2x-3 x^{2} 2y+2xy2y-xy(-4x)[/latex][latex] 2xy^{2} -6 x^{2} y+4xy^{2} +4 x^{2} y[/latex][latex]2xy^{2} -2 x^{2} y+4xy^{2}[/latex][latex]6xy^{2} -2 x^{2}y[/latex][latex]2xy(3y-x)[/latex]