Simplify x−3−y−3x−2−y−2\frac{x^{-3} - y^{-3}}{x^{-2} - y^{-2}}x−2−y−2x−3−y−3.
x2+xy+y2xy(x+y)\frac{x^2+xy+y^2}{xy(x+y)}xy(x+y)x2+xy+y2
x2−xy+y2xy(x+y)\frac{x^2-xy+y^2}{xy(x+y)}xy(x+y)x2−xy+y2
x2+xy+y2x+y\frac{x^2+xy+y^2}{x+y}x+yx2+xy+y2
x2−xy+y2x+y\frac{x^2-xy+y^2}{x+y}x+yx2−xy+y2