计算:[x^2+y^2)-(x-y)^2+2y(x-y)÷4y,若,2x-y的算术平方根是4,求代数式值的立方根
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x){nuӭ+⌴+4u5*t+5J0vJKuZYtgv>[ٌ&:66=ٽ
O?mR"oTOs;lܦǂըPS64֮к0QEn%DkC# η S:r-HYF6yvp 5
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