1) (3x^2 - xy)/(x + y) - (2x^2 + y^2)/(x + y) + xy/(y + x)2) (a^3 + b^3)/(a + b) + (3a^2b)/(a + b) + (3ab^2)/(a + b)3) (c^2/d - c - 2cd - d^2)/(d - c)
1) (3x^2 - xy)/(x + y) - (2x^2 + y^2)/(x + y) + xy/(y + x)
2) (a^3 + b^3)/(a + b) + (3a^2b)/(a + b) + (3ab^2)/(a + b)
3) (c^2/d - c - 2cd - d^2)/(d - c)