问题标题：
【m/x^2-2xy+y^2=x/x+y-y/x-y,求m没漏】
问题描述：
m/x^2-2xy+y^2=x/x+y-y/x-y,求m
没漏
曹振涛回答：
m/x^2-2xy+y^2=x/x+y-y/x-ym/(x-y)^2=(x(x-y)-y(x+y))/(x+y)(x-y)m/(x-y)^2=(x^2-xy-xy-y^2)/(x+y)(x-y)m=(x-y)^2(x^2-2xy-y^2)/(x+y)(x-y)m=(x-y)(x^2-2xy-y^2)/(x+y)
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