Question 707218


{{{x^3 + y^3 + x^2 - y^2}}}

{{{(x^3 + y^3) + (x^2 - y^2)}}}

{{{(x+y)(x^2-xy + y^2) + (x - y)(x+y)}}}

{{{(x+y)(x^2-xy +x+ y^2-y)}}}