化简求值(x²+y²)(x²-y²)-(x+y)²(x-y)²,其中x=4,y=1

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化简求值(x²+y²)(x²-y²)-(x+y)²(x-y)²,其中x=4,y=1
化简求值(x²+y²)(x²-y²)-(x+y)²(x-y)²,其中x=4,y=1

化简求值(x²+y²)(x²-y²)-(x+y)²(x-y)²,其中x=4,y=1