化简：|m|+|m-1|+|m-2|．

化简：|m|+|m-1|+|m-2|． 化简2[（m-1)m+m(m+1)]乘【(m-1)m-m(m+1)) 化简：2{（m-1)m+m(m+1)}{(m-1)m-m(m+1)}.若m是任意整数. 已知m＞4,化简|m-4|+|7-2m|+|m×m-2m+1|-|m×m-2m-3| 化简:m+|(1+m^2-2m)/(m-1)| 化简 |m|+| (2+m-m^2) 除以(m+1) | 化简|6-m|-|2m+1|+|m+5| (m 化简(m*m-2m)/(4-m*m) m^2-m/m^2-1÷m/m-1乘（m+1/m-1)^2 化简 已知m>4,化简:|m-4|+|7-2m|+|m^2-2m+1|-|m^2-2m-3| 化简,:3(m-1)^2+(m+2)(m^2-2m+4)-m(m^2+3m-3) 3(m+1)平方-5(m+1)(m-1)+2m(m-1)化简,求值