（x²+2xy+y²)(x²+xy+y²)²化简
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（x²+2xy+y²)(x²+xy+y²)²化简（x²+2xy+y²)(x²+xy+y²)²化简（x
（x²+2xy+y²)(x²+xy+y²)²化简
（x²+2xy+y²)(x²+xy+y²)²化简
（x²+2xy+y²)(x²+xy+y²)²化简
（x²+2xy+y²)(x²+xy+y²)²
=（x+y)²(x²+xy+y²)²
=(x^3+y^3)²