2(x-y)²-3(x-y)(-y-x)
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2(x-y)²-3(x-y)(-y-x)2(x-y)²-3(x-y)(-y-x)2(x-y)²-3(x-y)(-y-x)请在此输入您的回答,每一次专业解答都将打造您的权威
2(x-y)²-3(x-y)(-y-x)
2(x-y)²-3(x-y)(-y-x)
2(x-y)²-3(x-y)(-y-x)
请在此输入您的回答,每一次专业解答都将打造您的权威形象