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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}   There are two ways to present a mathematical expression--- \emph{inline} or as an \emph{equation}.  \subsection{Inline mathematical expressions}  Inline expressions occur in the middle of a sentence. To produce an inline expression, place the math expression between dollar signs (\verb!$!). For example, typing \verb!$E=mc^2$! yields $E=mc^2$.