(x-y+(4xy)/(x-y))*(x+y-(4xy)/(x+y)) 请问化简结果是多少?

怎么化简（x-y+4xy/x-y）（x+y-4xy/x+y）（/是分数线） {x-y+(4xy/x-y)}{x+y-(4xy/x+y)}怎么解? x^2y+4xy+4y (x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy) 5xy^2-[3xy^2-(4xy^2-2x^y)]+x^2y-xy^2如何化简 xy-1+x-y （x+y)*（x+1)-(xy+y*y)因式分解为多少 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 1.化简求值：(x+y)(x-y)-(x-y)²-6x²y÷2y+(2xy)²÷(-4xy 化简求值(x+y)(x-y)-(x-y)²-6x²y/2y+(2xy)²/(-4xy)其中 化简求值(x+y)(x-y)-(x-y)²-6x²y除2y+(2xy)²除(-4xy)其中 谁帮我化简：[(x+y)(x-y)-(x+y)^2-2y(x-y)-2xy]÷xy