deletions | additions       diff --git a/Version3.tex b/Version3.tex  index b68d71f..9b019c2 100644  --- a/Version3.tex  +++ b/Version3.tex 
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) +  \frac{d}{2}(1-2n)(n^2-n)  )  \intertext(After \intertext{After  some simplification, we are left with:) with:}  $$