\begin{table}
\begin{tabular}{*4l}
\W\widetilde{abc} &\W\widehat{abc} \\
\W\overleftarrow{abc} &\W\overrightarrow{abc} \\
\W\overline{abc} &\W\underline{abc} \\
\W\overbrace{abc} &\W\underbrace{abc} \\[5pt]
\W\sqrt{abc} &$\sqrt[n]{abc}$&\verb|\sqrt[n]{abc}| \\
$f'$&\verb|f'| &$\frac{abc}{xyz}$&\verb|\frac{abc}{xyz}|
\end{tabular}
\caption{Some other constructions}\label{other}
\end{table}