Simplify: frac1x+y+frac1x−y\\frac{1}{x+y} + \\frac{1}{x-y}frac1x+y+frac1x−y
frac2x\\frac{2}{x}frac2x
frac2yx2−y2\\frac{2y}{x^2-y^2}frac2yx2−y2
frac2xx+y\\frac{2x}{x+y}frac2xx+y
frac2xx2−y2\\frac{2x}{x^2-y^2}frac2xx2−y2