化简:(m-1)+2(m²-3m)-(2-m+5m²)

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化简:(m-1)+2(m²-3m)-(2-m+5m²)

(m-1)+2(m²-3m)-(2-m+5m²)
=m-1+2m²-6m-2+m-5m²
=-3m²-4m-3