\documentclass{article}
\input amssym
\title{Pdfjs Font Test}
\author{ShareLaTeX  Admin (Brian Gough)}
\date{July 2016}

\newcommand{\testfont}[1]{
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\left(#1\right) 
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\left[#1\right]
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}

\begin{document}

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\paragraph{Definition 1.} The {Galilean group} is defined as
\begin{eqnarray*}
{\rm Gal}(3) &=& \left\{
\left[\begin{array}{ccc} 1& 0 & s \\
{\bf v} & R & {\bf y} \\ 0 & 0 & 1
\end{array}\right] \Bigg|\; s\in {\Bbb R}\,,\,{\bf y},{\bf v}\in{\Bbb R}^3\,,\,R\in {\rm O}(3)\right\}
\end{eqnarray*}
with a natural closed Lie subgroup structure of ${\rm GL}(5;{\Bbb
R})$

\end{document}
