Simplify: fracx4−y4(x2+y2)(x+y)\\frac{x^4-y^4}{(x^2+y^2)(x+y)}fracx4−y4(x2+y2)(x+y) (assume x≠±yx \neq \pm yx=±y).
x−yx - yx−y
x+yx + yx+y
x2−y2x^2 - y^2x2−y2
fracx−yx+y\\frac{x-y}{x+y}fracx−yx+y