Question 1089262
{{{x^3-x^2*y-x*y^2+y^3}}}


{{{x^3-xy^2+y^3-x^2y}}}
{{{x(x^2-y^2)+y(y^2-x^2)}}}
{{{x(x^2-y^2)+(-1)y(x^2-y^2)}}}
not finished...