√2+丨√2-2丨-√(-16)²÷(-1/2)׳√-8

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√2+丨√2-2丨-√(-16)²÷(-1/2)׳√-8
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√2+丨√2-2丨-√(-16)²÷(-1/2)׳√-8
√2+丨√2-2丨-√(-16)²÷(-1/2)׳√-8

√2+丨√2-2丨-√(-16)²÷(-1/2)׳√-8
√2+丨√2-2丨-√(-16)²÷(-1/2)׳√-8
=√2+2-√2-16÷(-1/2)×(-2)
=2-16×(-2)×(-2)
=2-64
=-62
楼上的怎么做的?