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\item You can use sectioning commands like \verb|\section{},\subsection{},\subsubsection{}| to add headings.\footnote{You can toggle heading numbering on/off from the article settings. This footnote is generated via \verb|\footnote{}|}  \end{enumerate}  \section{} \section{How to use }  There are three ways to present a mathematical expression--- \emph{inline} (in the middle of a text line), as an \emph{equation}, on a separate dedicated line, and as a full-sized inline expression (\emph{displaystyle}).