(2m-3)+m-(3m-2)
计算:(m+3m+5m+…+2015m)-(2m+4m+6m+…+2014m)=
先化简再求值,m-3/3m-6m÷(m+2-5/m-2)
(m^3+4m^2+4m)/(m^2-4m)
计算:(2m*7m*3m)/(-42)m.(m为正整数)
(m+3m+5m+.+2008m)-(2m+4m+6m+.+2009m)
(m+3m+5m+...+2009m)-(2m+4m+6m+...2008m)
m-2m-3m+4m-5m-6m+7m.2004m=?
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)=