作业帮计算：（x|x^2－xy)^﹣3×（﹣x^2－2xy＋y^2)﹣2÷（x^2|xy－y^2)^2＝（x方－xy分之x）的负3次方×（负的xy分之x方－2xy＋y方）的负2次方÷（xy－y方分之x方）的2次方＝
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计算：（x|x^2－xy)^﹣3×（﹣x^2－2xy＋y^2)﹣2÷（x^2|xy－y^2)^2＝（x方－xy分之x）的负3次方×（负的xy分之x方－2xy＋y方）的负2次方÷（xy－y方分之x方）的2次方＝
计算：（x|x^2－xy)^﹣3×（﹣x^2－2xy＋y^2)﹣2÷（x^2|xy－y^2)^2＝
（x方－xy分之x）的负3次方×（负的xy分之x方－2xy＋y方）的负2次方÷（xy－y方分之x方）的2次方＝
计算：（x|x^2－xy)^﹣3×（﹣x^2－2xy＋y^2)﹣2÷（x^2|xy－y^2)^2＝（x方－xy分之x）的负3次方×（负的xy分之x方－2xy＋y方）的负2次方÷（xy－y方分之x方）的2次方＝
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（x|x^2－xy)^﹣3×（﹣(x^2－2xy+y^2)/xy)^﹣2÷（x^2|xy－y^2)^2＝
＝[(x^2-xy)/x]^3*[-xy/(x^2-2xy+y^2)]^2*(xy-y^2)^2/x^4
=[x(x-y)/x]^3*x^2y^2/(x-y)^(2)*y^2(x-y)^2/x^4
=(x-y)^3x^2y^2/(x-y)^(2)*y^2(x-y)^2/...
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（x|x^2－xy)^﹣3×（﹣(x^2－2xy+y^2)/xy)^﹣2÷（x^2|xy－y^2)^2＝
＝[(x^2-xy)/x]^3*[-xy/(x^2-2xy+y^2)]^2*(xy-y^2)^2/x^4
=[x(x-y)/x]^3*x^2y^2/(x-y)^(2)*y^2(x-y)^2/x^4
=(x-y)^3x^2y^2/(x-y)^(2)*y^2(x-y)^2/x^4
=(x-y)^3y^4/x^2
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[x/(x^2-xy)]^(-3)×[(x^2-2xy+y^2)/(-xy)]^(-2)÷[x^2/(xy-y^2)]^2
=[1/(x-y)]^(-3)×[(x-y)^2/(xy)]^(-2)÷[x^2/y(x-y)]^2
=(x-y)^3×[(xy)/(x-y)^2]^2×[y(x-y)/x^2]^2
=(x-y)^3×(xy)^2/(x-y)^4×y^2(x-y)^2/x^4
=(x-y)*y^4/x^2
=y^4/x-y^5/x^2