(x+y)²-(x+2y)(x-2y)-2y(x+2y),其中x=2013²,

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(x+y)²-(x+2y)(x-2y)-2y(x+2y),其中x=2013²,
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(x+y)²-(x+2y)(x-2y)-2y(x+2y),其中x=2013²,
(x+y)²-(x+2y)(x-2y)-2y(x+2y),其中x=2013²,

(x+y)²-(x+2y)(x-2y)-2y(x+2y),其中x=2013²,