homework template

\documentclass[12pt]{exam}
\usepackage{amsthm}
\usepackage{libertine}
\usepackage[utf8]{inputenc}
\usepackage[margin=1in]{geometry}
\usepackage{amsmath,amssymb}
\usepackage{multicol}
\usepackage[shortlabels]{enumitem}
\usepackage{siunitx}
\usepackage{cancel}
\usepackage{graphicx}
\usepackage{pgfplots}
\usepackage{listings}
\usepackage{tikz}


\pgfplotsset{width=10cm,compat=1.9}
\usepgfplotslibrary{external}
\tikzexternalize

\newcommand{\class}{Course Name Here} % This is the name of the course 
\newcommand{\examnum}{Assignment Name Here} % This is the name of the assignment
\newcommand{\examdate}{Date Here} % This is the due date
\newcommand{\timelimit}{}





\begin{document}
\pagestyle{plain}
\thispagestyle{empty}

\noindent
\begin{tabular*}{\textwidth}{l @{\extracolsep{\fill}} r @{\extracolsep{6pt}} l}
\textbf{\class} & \textbf{Name:} & \textit{Your Name Here}\\ %Your name here instead, obviously 
\textbf{\examnum} &&\\
\textbf{\examdate} &&\\
\end{tabular*}\\
\rule[2ex]{\textwidth}{2pt}
% ---




\begin{enumerate} %You can make lists!

\item This is the first item.

\item This will make another item. % You can do this for each question.

\item Yet another item. 

\item Lists within lists! \begin{enumerate}
\item ha-HA!
\item see?

\end{enumerate}


\end{enumerate}

Look! Math! $f(x)=4x^2 - \frac{3}{4}x +1$ %use the dollar signs to go into math mode


\end{document}