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\section{Symbols (in \emph{math} mode)}  \subsection{The basics}  As discussed above  ath mode in LaTeX happens inside the dollar signs (\verb!$...$!), inside the square brackets \verb!\[...\]! and inside \verb|equation| and \verb!displaystyle! environments. \begin{tabular}{lll}  \emph{description} & \emph{command} & \emph{output}\\