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Formatting Problems

Note.  Using tildes (~) for spaces works in WordPress LaTeX \texttt environments but not usually elsewhere.

\begin{array}{|c|} \hline \texttt{(~)} \\ \texttt{(} x \texttt{)(} y \texttt{)} \\ \texttt{(} x \texttt{)~} y \texttt{~} \\ \texttt{(} x \texttt{)~~~} \\ \texttt{~} x \texttt{~(} y \texttt{)} \\ \texttt{~~~(} y \texttt{)} \\ \texttt{(} x \texttt{,~} y \texttt{)} \\ \texttt{(} x \texttt{~~} y \texttt{)} \\ \hline x \texttt{~~} y \\ \texttt{((} x \texttt{,~} y \texttt{))} \\ \texttt{~~~~~} y \texttt{~~} \\ \texttt{~(} x \texttt{~(} y \texttt{))} \\ \texttt{~~} x \texttt{~~~~~} \\ \texttt{((} x \texttt{)~} y \texttt{)~} \\ \texttt{((} x \texttt{)(} y \texttt{))} \\ \texttt{((~))} \\ \hline \end{array}