\documentstyle[]{article}

\pagestyle{empty}

\textheight       100cm
\evensidemargin     0cm
\oddsidemargin      0cm
\topmargin          0cm
\textwidth         17cm

\begin{document}

\def\beginsymbols{\begin{tabbing}
     \hspace{0.8cm}\=\hspace{3.5cm}\=  \hspace{0.8cm}\=\hspace{3.5cm}\=
     \hspace{0.8cm}\=\hspace{3.5cm}\=  \kill }
\def\endsymbols{\end{tabbing}}

\subsection*{Arrows and Braces}

The following symbols can be used in math mode:

\beginsymbols
$\leftarrow $\> \verb|\leftarrow| \>$\longleftarrow $\>
\verb|\longleftarrow| \>
  $\uparrow $\> \verb|\uparrow| \\
$\Leftarrow $\> \verb|\Leftarrow| \>$\Longleftarrow $\>
\verb|\Longleftarrow| \>
  $\Uparrow $\> \verb|\Uparrow| \\
$\rightarrow $\> \verb|\rightarrow| \>$\longrightarrow $\>
\verb|\longrightarrow| \>
  $\downarrow $\> \verb|\downarrow| \\
$\Rightarrow $\> \verb|\Rightarrow| \>$\Longrightarrow $\>
\verb|\Longrightarrow| \>
  $\Downarrow $\> \verb|\Downarrow| \\
$\leftrightarrow $\> \verb|\leftrightarrow| \>$\longleftrightarrow $\>
\verb|\longleft...| \>
  $\updownarrow $\> \verb|\updownarrow| \\
$\Leftrightarrow $\> \verb|\Leftrightarrow| \>$\Longleftrightarrow $\>
\verb|\Longleft...| \>
  $\Updownarrow $\> \verb|\Updownarrow| \\
$\mapsto $\> \verb|\mapsto| \>$\longmapsto $\> \verb|\longmapsto| \>
  $\nearrow $\> \verb|\nearrow| \\
$\hookleftarrow $\> \verb|\hookleftarrow| \>$\hookrightarrow $\>
\verb|\hookrightarrow| \>
  $\searrow $\> \verb|\searrow| \\
$\leftharpoonup $\> \verb|\leftharpoonup| \>$\rightharpoonup $\>
\verb|\rightharpoonup| \>
  $\swarrow $\> \verb|\swarrow| \\
$\leftharpoondown $\> \verb|\leftharpoondown| \>$\rightharpoondown $\>
\verb|\rightharpoondown| \>
  $\nwarrow $\> \verb|\nwarrow| \\
$\rightleftharpoons $\> \verb|\rightleftharpoons| \>\>\>
  $\leadsto $\> \verb|\leadsto| 
\endsymbols
 
\beginsymbols
$($       \> \verb|(|       \>$[$      \>  \verb|[|       \>
$\{$     \> \verb|\{|     \\
$\lbrack $\> \verb|\lbrack| \>$\lfloor $\> \verb|\lfloor| \>
$\lceil $\> \verb|\lceil| \\
$\lbrace $\> \verb|\lbrace| \>$\langle $\> \verb|\langle| \\

$)$       \> \verb|)|       \>$]$      \>  \verb|]|       \>
$\}$     \> \verb|\}|     \\
$\rbrack $\> \verb|\rbrack| \>$\rfloor $\> \verb|\rfloor| \>
$\rceil $\> \verb|\rceil| \\
$\rbrace $\> \verb|\rbrace| \>$\rangle $\> \verb|\rangle| 
\endsymbols

\end{document}

.
