5x²+5xy/x²-y²·(4x-4y)计算

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5x²+5xy/x²-y²·(4x-4y)计算
5x²+5xy/x²-y²·(4x-4y)计算

5x²+5xy/x²-y²·(4x-4y)计算
吧X设为1,把Y设为2