计算[（x+2y)²-2xy][(x-2y)²+2xy]（x+2y)(x-2y)
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计算[（x+2y)²-2xy][(x-2y)²+2xy]（x+2y)(x-2y)计算[（x+2y)²-2xy][(x-2y)²+2xy]（x+2y)(x-2y)
计算[（x+2y)²-2xy][(x-2y)²+2xy]（x+2y)(x-2y)
计算[（x+2y)²-2xy][(x-2y)²+2xy]（x+2y)(x-2y)
计算[（x+2y)²-2xy][(x-2y)²+2xy]（x+2y)(x-2y)
[(X)²-(4y)²]^3