(1/2x-y)²*(1/2x+y)²*(1/4x+y²)²=?

(1/2x-y)²*(1/2x+y)²*(1/4x+y²)²=?
(1/2x-y)²*(1/2x+y)²*(1/4x+y²)²=?

(1/2x-y)²*(1/2x+y)²*(1/4x+y²)²=?
您好：

(1/2x-y)²*(1/2x+y)²*(1/4x+y²)²
=(1/4x²-y²)²(1/4x+y²)²
=(1/16x^4-y^4)²
=1/256x8-1/8x^4y^4+y^8

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