已知m＞4 化简|m-4|+|7-2m|

已知m＞4,化简|m-4|+|7-2m|+|m×m-2m+1|-|m×m-2m-3| 已知m＞4 化简|m-4|+|7-2m| 已知m>4,化简:|m-4|+|7-2m|+|m^2-2m+1|-|m^2-2m-3| m-2m-3m+4m-5m-6m+7m.2004m=? 化简(m*m-2m)/(4-m*m) (m+3m5m+7m+.2009m)-(2m+4m+6m.2008m) (m+3m+5m+7m+.+2009m)-(2m-4m-6m-.-2008m)=? (m+3m+5m+7m+.+2011m)-(2m+4m+6m+.+2010m) 要说理由! m-2m-3m+4m-5m-6m+7m-8m-9m+.+2002m-2003m-2004m 已知2^m=a,化简16×2^2m-1 ×2^3m-1 -4^m ×8^m 已知-3＜m＜2.化简|m-2|+|m+3|-|3m+9|-|2m-4| 已知m的绝对值=-m 化简|m|-|m-2|