deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 10255c1..5b872b2 100644  --- a/untitled.tex  +++ b/untitled.tex 
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\textwidth = 426pt  \textheight = 674pt \usepackage[margin=0.5in]{geometry}  \section{The original model}  The equations in the original model are as follows:\\  \begin{equation} 
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