﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2 计算题啊 ﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2

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﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2计算题啊﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2计算题啊﹣﹙﹣xy

﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2 计算题啊 ﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2
﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2 计算题啊
﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2

﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2 计算题啊 ﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2
﹣﹙﹣xy﹚^2(x^2－xy－y^2)＋﹙x^2y)^2
=-x²y²(x²-xy-y²)+x^4y²
=-x^4y²+x³y³+x²y^4+x^4y²
=x³y³+x²y^4