2/m-3+12/9-m^2
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2/m-3+12/9-m^22/m-3+12/9-m^22/m-3+12/9-m^22/m-3+12/9-m^2=2/(m-3)-12(m-3)(m+3)=[2(m+3)-12]/(m+3)(m-3)
2/m-3+12/9-m^2
2/m-3+12/9-m^2
2/m-3+12/9-m^2
2/m-3+12/9-m^2
=2/(m-3)-12(m-3)(m+3)
=[2(m+3)-12]/(m+3)(m-3)
=2(m-3)/(m+3)(m-3)
=2/(m+3)
m-2m-3m+4m-5m-6m+7m-8m-9m+...+2002m-2003m-2004m求m的值
计算：m-2m-3m+4m-5m-6m+7m-8m-9m+...+2002m-2003m-2004m
m-2m-3m+4m-5m-6m+7m-8m-9m+.+2002m-2003m-2004m
计算(m^2-9)/[m(m-3)+m-3]
2/m-3+12/9-m^2
1/m(m+1)+1/(m+1)(m+2)+1/(m+2)(m+3)+.+1/(m+9)(m+10)
2m+3m+5m+7m+9m+…+2003m+2005m+2007m
(m-3分之5m+m+3分之2m)*m分之m^2-9
化简：(m/m+3-2m/m+3)÷m/m^-9
m^2-12m
计算：（m+3m+5m+...+2009m)-(2m+4m+6m+...+2008m)
(m+3m+5m+...+2009m)-(2m+4m+6m+...2008m)
(m+3m+5m+...+2014m)-(2m+4m+6m+...+2013m)
(m+3m+5m+...+2013m)-(2m+4m+6m+...+2012m)
(m+3m+5m+...+2015m)-(2m+4m+6m+...+2014m)=
计算:(m+3m+5m+...+2009m)-(2m+4m+6m+...+2010m)
m-2m-3m+4m-5m-6m+7m.2004m=?
(m+3m+5m.+2013m)-(2m+4m+6m+.+2012m)=?