-(-0.5x³-2x²y+1/2xy²)去括号

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-(-0.5x³-2x²y+1/2xy²)去括号
-(-0.5x³-2x²y+1/2xy²)去括号

-(-0.5x³-2x²y+1/2xy²)去括号
-(-0.5x³-2x²y+1/2xy²)
=0.5x³+2x²y-1/2xy²