Выполните деление(фото):
(x2-y2)2/(x2+2xy+y2)//(1/x2-1/y2)
1/x2-1/y2=(y2-x2)/(x2y2)
(x2-y2)2/(x2+2xy+y2)//(y2-x2)/(x2y2)
(x2-y2)2*(x2y2) //(x2+2xy+y2)*(y2-x2)
(x^2*y^3-x^3*y^2)/(y+x)