[12(x+y)³(y-x)]³÷[4(x+y)²(x-y)]²
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(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
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已知x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+
计算 [12(x+y)³(y-x)]³÷[4(x+y)²(x-y)]²