问题标题：
【5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2]】
问题描述：
5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2]
金维宇回答：
5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2]
=-[(5/4)*(4/3)*(3/5)](x+y)*(x+y)^3*(x-y)*(x-y)^2
=-(x+y)^4*(x-y)^3.
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