deletions | additions       diff --git a/bits3.tex b/bits3.tex  index c9180e9..33f65b5 100644  --- a/bits3.tex  +++ b/bits3.tex 
...
\begin{center}  \begin{tabular}{ |c || c | c | c | }  \hline  x^3 $x^3$  & x^2 $x^2$  & x $x$  & 1 $1$  \\ \hline  \end{tabular}  \end{center}