题目先化简,再求值:(xy2+x2y)⋅xx2+2xy+y2÷x2yx2−y2(xy^{2}+x^{2}y)\cdot \frac{x}{x^2+2xy+y^2}\div \frac{x^2y}{x^2-y^2}(xy2+x2y)⋅x2+2xy+y2x÷x2−y2x2y,其中x=π0−(12)−1x=\pi ^{0}-(\frac{1}{2})^{-1}x=π0−(21)−1,y=−2y=-2y=−2.知识点：分式的化简求值章节：数与式 / 分式
