计算(x^2+y^2)^2(x^2-y^2)^2
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计算(x^2+y^2)^2(x^2-y^2)^2计算(x^2+y^2)^2(x^2-y^2)^2计算(x^2+y^2)^2(x^2-y^2)^2原式=[(x²+y²)(x²
计算(x^2+y^2)^2(x^2-y^2)^2
计算(x^2+y^2)^2(x^2-y^2)^2
计算(x^2+y^2)^2(x^2-y^2)^2
原式=[(x²+y²)(x²-y²)]²
=(x⁴-y⁴)²
=x^8-2x⁴y⁴+y^8
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