2m-1/m-1可化简吗

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|+|m-1|+|m-2|． 化简:m+|(1+m^2-2m)/(m-1)| (m+1)(m-1)(m-2)(m-4) 分式m-m^2分之m^2-2m+1 化简 |m|+| (2+m-m^2) 除以(m+1) | 化简|6-m|-|2m+1|+|m+5| (m (1m+3m+5m+...+2009m)-(2m+4m+6m+...=2008m) m^2-m/m^2-1÷m/m-1乘（m+1/m-1)^2 化简 2m^2-5m+1/m^2 怎么等于(m^2-5M)+m^2+1/m^2