2m(m²-n+1)计算

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2m(m²-n+1)计算2m(m²-n+1)计算2m(m²-n+1)计算解2m(m²-n+1)=2m³-2mn+2m

2m(m²-n+1)计算
2m(m²-n+1)计算

2m(m²-n+1)计算

2m(m²-n+1)
=2m³-2mn+2m