\(\frac{1}{2012}\)+\(\frac{1}{2013}\)-\(\frac{1}{2014}\) \(\frac{2}{2013}\)+\(\frac{2}{2014}\)-\(\frac{2}{2015}\)
_________________________ + __________________________
\(\frac{5}{2012}\)+\(\frac{5}{2013}\)-\(\frac{5}{2014}\) \(\frac{3}{2013}\)+\(\frac{3}{2014}\)-\(\frac{3}{2015}\)