\documentclass[12pt]{article}

\usepackage[margin=1.0in]{geometry}

\setlength\parindent{0pt}

\begin{document}

\title{\textbf{My Title}}
\author{Joseph Hobbs}
\maketitle
\tableofcontents


\section{My Special Header}




\subsection{My Special Subheader}




\subsubsection{My Special Subsubheader}




This is a paragraph.\par


$$
F_{g} := m g
$$
$$
U := F_{g} h
$$
$$
m := 10000.0000 \; \mathrm{g}
$$
$$
g := 9.8100 \; \mathrm{m} \; \mathrm{s^{-2}}
$$
$$
h := 10.0000 \; \mathrm{m}
$$


\section{Evaluation}


$$
U = F_{g} h
$$
$$
981.0000 \; \mathrm{J}
$$
$$
F_{g} = m g
$$
$$
98.1000 \; \mathrm{N}
$$


\end{document}