deletions | additions       diff --git a/Version1.tex b/Version1.tex  index 0093f3b..84105db 100644  --- a/Version1.tex  +++ b/Version1.tex 
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& + \frac{d}{2}(\frac{n(n-1)(2n-1)}{6}) +  \frac{d}{2}(1-2n)\frac{1}{2}n(n-1) \\  & = \frac{1}{2}((c+d)(n^2 + n) + d(n^3 - n^2) n^2))  \\ & + \frac{1}{2}(d(\frac{n^3}{3} - \frac{n^2}{2} + \frac{n}{6}) + \frac{d}{2}(1-2n)(n^2-n))  \end{split}  \end{equation}