化简.下题2m²-[6m-﹙2m-1﹚]-3﹙m²-m-4﹚
化简.下题2m²-[6m-﹙2m-1﹚]-3﹙m²-m-4﹚
若m²+m-1=0,则m³+2m+3等于﹙﹚?
计算2m+6/m²-4m+4·1/m+3·(m-2)(m+3)/m+3
已知m>4,化简|m-4|+|7-2m|+|m×m-2m+1|-|m×m-2m-3|
(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)=