计算：（x|x^2－xy)^﹣3×（﹣x^2－2xy＋y^2)﹣2÷（x^2|xy－y^2)^2＝

（x^2+xy/x-y)/（xy/x-y)计算 计算3xy[2xy-x(y-2)+x-1] 计算：3xy[2xy-x（y-2）+x] （xy-x^2)乘以(xy)/(x-y) 计算（xy-y^2)÷x-y/xy 计算：(x+y/x-y)÷(xy+x^2) 2x²y＋｛2xy-[x²y-2(﹣3x²y+xy)]﹣4xy²｝ 计算 x-y/xy-y^2计算 (x^2-xy)y÷y-x/xy怎么做? 计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2 (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y) x-y/x²÷x²-2xy+y²/xy*（xy-x²）