diff --git a/lbol.tex b/lbol.tex
index 1424097..9afb6af 100644
--- a/lbol.tex
+++ b/lbol.tex
@@ -338,7 +338,7 @@ Comments are created by adding a \texttt{\%} to the line. Anything beyond the pe
 
 To create multi-line comments, surround those lines with \verb|\iffalse| and \verb|\fi|: 
 
-\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, framesep=3mm, breaklines=true, label=Multi-line Comment Block]
+\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, framesep=3mm, breaklines=true, label=\fbox{Multi-line Comment Block}]
 \iffalse
 These lines will not appear in your published text.
 That is because they are surrounded by \iffalse and \fi.
@@ -825,7 +825,7 @@ You can also control the size of brackets and parentheses explicitly:
 \hline
 	\rule{0pt}{22pt} \verb+\bigr] \Bigr] \biggr] \Biggr]+ & \rule{0pt}{22pt} $\bigr] ~\Bigr] ~\biggr] ~\Biggr]$ \\[15pt]
 \hline
-	\rule{1pt}{22pt} \verb+\bigl\{ \Bigl\{ \biggl\{ \Biggl\{+ & \rule{0pt}{22pt} $\bigl\{ ~\Bigl\{ ~\biggl\{ ~\Biggl\{$ \\[15pt]
+	\rule{0pt}{22pt} \verb+\bigl\{ \Bigl\{ \biggl\{ \Biggl\{+ & \rule{0pt}{22pt} $\bigl\{ ~\Bigl\{ ~\biggl\{ ~\Biggl\{$ \\[15pt]
 \hline
 	\verb+\bigl \langle \Bigl \langle+ \verb+\biggl \langle \Biggl \langle+ & \rule{0pt}{22pt} $\bigl  \langle ~\Bigl \langle ~\biggl \langle ~\Biggl \langle$ \\[15pt]
 \hline
@@ -850,31 +850,31 @@ You can also control the size of brackets and parentheses explicitly:
 
 You can use the \texttt{align} environment to typeset long equations and formulas and get them to line up nicely. 
 
-Break your lines with \verb+\\+ and use \$ to show where the equations should align.
+Break your lines with \verb+\\+ and use \& to show where the equations should align.
 
-\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, framesep=3mm, breaklines=true, label=align Example]
+\begin{Verbatim}[frame=lines, numbers=left, xleftmargin=5mm, framesep=3mm, breaklines=true, label=\fbox{align Example}]
 \begin{align}
-a_1& =b_1+c_1\\
-a_2& =b_2+c_2-d_2+e_2
+a_1 & = b_1+c_1\\
+a_2 & = b_2+c_2-d_2+e_2
 \end{align}
 
 \begin{align*}
-a_1& =b_1+c_1\\
-a_2& =b_2+c_2-d_2+e_2\\
-a_2+d_2-e_2&=b_2+c_2
+a_1 & = b_1+c_1\\
+a_2 & = b_2+c_2-d_2+e_2\\
+a_2+d_2-e_2 & = b_2+c_2
 \end{align*}
 \end{Verbatim}
 
 \begin{align}
-a_1& =b_1+c_1\\
-a_2& =b_2+c_2-d_2+e_2\\
-a_2+d_2-e_2&=b_2+c_2
+a_1 & = b_1+c_1\\
+a_2 & = b_2+c_2-d_2+e_2\\
+a_2+d_2-e_2 & = b_2+c_2
 \end{align}
 
 \begin{align*}
-a_1& =b_1+c_1\\
-a_2& =b_2+c_2-d_2+e_2\\
-a_2+d_2-e_2&=b_2+c_2
+a_1 & = b_1+c_1\\
+a_2 & = b_2+c_2-d_2+e_2\\
+a_2+d_2-e_2 & = b_2+c_2
 \end{align*}
 
 \bigskip
@@ -916,7 +916,7 @@ bear & camel & naked~mole~rats
 \end{array}\right\}
 \]
 
-\paragraph{Note:} Because the \texttt{array} environment is designed for math applications, rather than a text application like our example, I had to use a $\sim$ to add the spaces in ``naked mole rats''.
+\paragraph{Note:} Because the \texttt{array} environment is designed for math applications, rather than a text application like our example, I had to use a $\sim$ to add the spaces in ``Zoo animals'' and ``naked mole rats''.
 
 If the built-in \texttt{array} environment cannot do all that you want, use the \texttt{amsmath} package and its \texttt{matrix} environment, which provides more options.