|1/2013-1/2012|+ |1/2012-1/2011|+|1/2011-1/2010|-|1/2010-1/2
|1/2013-1/2012|+ |1/2012-1/2011|+|1/2011-1/2010|-|1/2010-1/2
|1/2013-1/2012|+|1/2012-1/2011|+|1/2011-1/2010|
|1/2013-1/2012|+|1/2012-1/2011|+|1/2011+1/2010|
[(2012^2-2011*2012)/(2011^2-2010*2011)-1]*2011
2010*2012/2011+2013/1=?
1/1×2+1/2×3+1/3×4+…+1/2010×2011+1/2012×2013
2011*2012-1分之2011+2012*2010
2012/1+2012/2+2012/3+...2012/2010+2012/2011
(1/2012-1)(1/2011-1)(1/2010-1)...(1/3-1)(1/2-1)咋算
(1\2012-1)(1\2011-1)(1\2010-1)...(1\3-1)(1\2-1)=?
(2012+1/2011)/(2011+1/2012)+(2010+1/2011)/(2011+1/2010)的简便方法
|1/2011-1/2010|-|1/2012-1/2010|+|1/2012-1/2011|=?