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One of the questions we get more often from our users at Authorea is: \textit{why \begin{quote}   why  is this LaTeX command not working?} working?   \end{quote}  The short answer to that question is: \textbf{because \begin{quote}   Because  that LaTeX command was not intended for a webpage; it was intended for the printer.} printer.   \end{quote}  Authorea is a collaborative editor for technical and scholarly documents which understands and renders markup languages such as Markdown, and LaTeX. We do enjoy and use LaTeX frequently at Authorea. This post for example, was written on Authorea in LaTeX. Let's grab a pre-baked equation, for example this Fourier transform: \verb|a \Leftrightarrow 2\pi a\sum\limits_{k = - \infty }^\infty {\delta (\omega + 2\pi k)} ,( - \infty < n < \infty )| and render it as: