\documentclass{article}
\title{My First Latex Document}
\author{Adnan Masood}
\date{7/20/2012}
\begin{document}
\maketitle
Hello NSU!
\textbf{this is bold text}
This is my mathematical equation
$a^2+b^2=c^2$
\begin{equation}
a^2+b^2=c^2
\label{pythag}
\end{equation}

\begin{table}[H]
\caption{This table is an example. \label{exampleTable}}
\begin{center}
\begin{tabular}{|c|c|c|}
\hline
row 1, column 1 & row 1, column 2 & row 1, column 3 \\ \hline
row 2, column 1 & row 2, column 2 & row 2, column 3 \\
row 3, column 1 & row 3, column 2 & row 3, column 3 \\ \hline
\multicolumn{2}{|c|}{row 4, two columns} & row 4, column 4 \\ \hline
\end{tabular}
\end{center}
\end{table}


\end{document}