（x^2+xy/x-y)/（xy/x-y)计算
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（x^2+xy/x-y)/（xy/x-y)计算（x^2+xy/x-y)/（xy/x-y)计算（x^2+xy/x-y)/（xy/x-y)计算【x²+xy/（x-y）】/【xy/（x-y）】=【
（x^2+xy/x-y)/（xy/x-y)计算
（x^2+xy/x-y)/（xy/x-y)计算
（x^2+xy/x-y)/（xy/x-y)计算
【x²+xy/（x-y）】/【xy/（x-y）】
=【x²（x-y）/（x-y）+xy/（x-y）】/【xy/（x-y）】
={【x²（x-y）+xy】/（x-y）}/【xy/（x-y）】
=【x²（x-y）+xy】/xy
=【x（x-y)】/y+1
=（x²-xy）/y+1
=x²/y-x+1
(X^2-XY+Y)/Y
下面是0 有意义吗？用配方可以做吗？有点。。。
（x^2+xy/x-y)/（xy/x-y)
=（x^2+xy)/（xy)
=x（x+y)/（xy)
=(x+y)/y
=x/y+1
（x^2+xy/x-y)/（xy/x-y)
=（x^2+xy)/（xy)
=(x/y)+1
（x^2+xy/x-y)/（xy/x-y)计算
|x|/x+y/|y|+xy/|xy|=
x^2-xy/xy-y^2约分
(-x-y)(x^2+xy+y^2)
化简x^-y^/x^-2xy+y^
2*(x-y)²(y-x)(xy)
.(x+y-2)(x+y-2xy)+(xy-1)^2
(x^2-xy)y÷y-x/xy怎么做?
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-x-3xy+y
xy-1+x-y
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计算：(xy-x²)×x-y/xy
【xy-x²】*xy/x-y
(xy-x²)÷(x²-2xy+y²/xy)×（x-y/x²）
x-y/x²÷x²-2xy+y²/xy*（xy-x²）