3m-4(2mn-2n+4m)-2(7n+5m)化简,

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3m-4(2mn-2n+4m)-2(7n+5m)化简,3m-4(2mn-2n+4m)-2(7n+5m)化简,3m-4(2mn-2n+4m)-2(7n+5m)化简,

3m-4(2mn-2n+4m)-2(7n+5m)化简,
3m-4(2mn-2n+4m)-2(7n+5m)化简,

3m-4(2mn-2n+4m)-2(7n+5m)化简,