求(X+Y)(X-Y)(X²+Y²),X=5 Y=2,

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求(X+Y)(X-Y)(X²+Y²),X=5 Y=2,
求(X+Y)(X-Y)(X²+Y²),X=5 Y=2,

求(X+Y)(X-Y)(X²+Y²),X=5 Y=2,
609!