-2的平方 减负二分之一的负二次方 减二减2根号下2的绝对值 +根号下8

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(-2)^2-(-1/2)^(-2)-|2-2√2|+√郑卖8
=4-1/4-(2√2-2)+2√2
=4+2-1/喊悔逗4
=23/前拆4

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