\def\mmlent#1#2{#1&#2&\begin{MathML}<mtext>&#2;</mtext>\end{MathML}\\ \hline}
\section{MathML Entities: \\ Code Positions 0x2400-0x24FF}
\begin{tabular}{|c|l|c|}
\hline
\mmlent{0x2423}{blank}
\mmlent{0x24C8}{circledS}
\mmlent{0x24C8}{oS}
\end{tabular}
