m-2m-3m+4m-5m-6m+7m-8m-9m+.+2002m-2003m-2004m

m-2m-3m+4m-5m-6m+7m-8m-9m+.+2002m-2003m-2004m m-2m-3m+4m-5m-6m+7m.2004m=? (m+3m+5m+.+2008m)-(2m+4m+6m+.+2009m) (m+3m+5m+...+2009m)-(2m+4m+6m+...2008m) 计算:(m+3m+5m+...+2009m)-(2m+4m+6m+...+2010m) (m+3m+5m+...+2013m)-(2m+4m+6m+...+2012m) (m+3m+5m.+2013m)-(2m+4m+6m+.+2012m)=? (m+3m+5m+...+2014m)-(2m+4m+6m+...+2013m) (m+3m+5m+...+2015m)-(2m+4m+6m+...+2014m)= M (\M/) M.