Expanding the expression:
Xy + xy - 2x^3 + x^2y - 2xy^2 + y^3
Combining like terms:
2xy - 2x^3 + x^2y - 2xy^2 + y^3
Expanding the expression:
Xy + xy - 2x^3 + x^2y - 2xy^2 + y^3
Combining like terms:
2xy - 2x^3 + x^2y - 2xy^2 + y^3