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]

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.