计算(xy-y^2)÷x-y/xy
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计算(xy-y^2)÷x-y/xy
计算(xy-y^2)÷x-y/xy
计算(xy-y^2)÷x-y/xy
(xy-y^2)÷x-y/xy
=y(x-y)×[xy/(x-y)]
=xy²
计算(xy-y^2)÷x-y/xy
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