deletions | additions       diff --git a/Version1.tex b/Version1.tex  index f07d417..84563ff 100644  --- a/Version1.tex  +++ b/Version1.tex 
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\sum_{i=0}^{n-1} f_2(n,i) & =  (c+d)\sum_{i=0}^{n-1} (\sum_{j=i}^{n-1} 1) +  \frac{d}{2}n(n-1)\sum_{i=0}^{n-1} 1 \\  & + \frac{d}{2}\sum_{i=0}^{n-1} i^2 +  \frac{d}{2}(1-2n)\sum_{i=0}^{n-1} i \\