--- a/slides/slides07.tex	Sun Nov 15 21:31:31 2015 +0000
+++ b/slides/slides07.tex	Mon Nov 16 15:16:17 2015 +0000
@@ -281,9 +281,8 @@
 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\mode<presentation>{
 \begin{frame}[t]
-\frametitle{\begin{tabular}{c}Compiling AExps\end{tabular}}
+\frametitle{Compiling AExps}
 
 \begin{center}
 \bl{\begin{tabular}{@{}lcl@{}}
@@ -295,9 +294,9 @@
 $\text{compile}(a_1 * a_2)$ & $\dn$\\ 
 \multicolumn{3}{l}{$\qquad\text{compile}(a_1) \;@\; \text{compile}(a_2)\;@\; \text{imul}$}\smallskip\\
 \end{tabular}}
-\end{center}\pause
+\end{center}
 
-\end{frame}}
+\end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -325,9 +324,8 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\mode<presentation>{
 \begin{frame}[t]
-\frametitle{\begin{tabular}{c}Variables\end{tabular}}
+\frametitle{Variables}
 
 {\Large\bl{$x := 5 + y * 2$}}\bigskip\pause   
 
@@ -343,28 +341,27 @@
 \bl{$\text{compile}(a, E)$}
 \end{center}
 
-\end{frame}}
+\end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\mode<presentation>{
 \begin{frame}[t]
-\frametitle{\begin{tabular}{c}Compiling AExps\end{tabular}}
+\frametitle{Compiling AExps}
 
 \begin{center}
 \bl{\begin{tabular}{@{}lcl@{}}
 $\text{compile}(n, E)$ & $\dn$ & $\text{ldc}\;n$\\
 $\text{compile}(a_1 + a_2, E)$ & $\dn$\\ 
-\multicolumn{3}{l}{$\qquad\text{compile}(a_1, E) \;@\;\text{compile}(a_2. E)\;@\; \text{iadd}$}\smallskip\\
+\multicolumn{3}{l}{$\qquad\text{compile}(a_1, E) \;@\;\text{compile}(a_2, E)\;@\; \text{iadd}$}\smallskip\\
 $\text{compile}(a_1 - a_2, E)$ & $\dn$\\ 
 \multicolumn{3}{l}{$\qquad\text{compile}(a_1, E) \;@\; \text{compile}(a_2, E)\;@\; \text{isub}$}\smallskip\\
 $\text{compile}(a_1 * a_2, E)$ & $\dn$\\ 
 \multicolumn{3}{l}{$\qquad\text{compile}(a_1, E) \;@\; \text{compile}(a_2, E)\;@\; \text{imul}$}\bigskip\\
 $\text{compile}(x, E)$ & $\dn$ & $\text{iload}\;E(x)$\\
 \end{tabular}}
-\end{center}\pause
+\end{center}
 
-\end{frame}}
+\end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%