7m^2n-3mn^2+5m^2n+2mn^2
1个回答
7m^2n-3mn^2+5m^2n+2mn^2
=(7+5)m^2n+(-3+2)mn^2
=12m^2n-mn^2
相关问题
7m²n-3mn²+5m²n+2mn²
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