Simplify: x2+xy−2y2x2−y2\frac{x^2+xy-2y^2}{x^2-y^2}x2−y2x2+xy−2y2
x−2yx−y\frac{x-2y}{x-y}x−yx−2y
x+2yx+y\frac{x+2y}{x+y}x+yx+2y
x−2yx+y\frac{x-2y}{x+y}x+yx−2y
x+2yx−y\frac{x+2y}{x-y}x−yx+2y