作业帮计算(x+y)(x+y)^2(-x-y)^3
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计算(x+y)(x+y)^2(-x-y)^3
计算(x+y)(x+y)^2(-x-y)^3
计算(x+y)(x+y)^2(-x-y)^3
(x+y)(x+y)^2(-x-y)^3
=－(x+y）^6
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