\documentclass[11pt]{article}
\usepackage{amsmath,amsfonts,epsfig}
\newcommand{\cx}{{\mathbb C}}
\newcommand{\reals}{{\mathbb R}}
\newcommand{\integers}{{\mathbb Z}}


\begin{document}
\begin{center}
{\bf Math 6220\\ Homework N\\ \today}
\end{center}

\noindent {\bf Problem X.X.X.X} Type your solution here. I've included three macros that may be helpful throughout the semester. If you type \verb+$\cx$+ you get $\cx$, \verb+$\reals$+ you get $\reals$ and \verb+$\integers$+ you get $\integers$.

%This will give a space between the problems
\medskip
 \end{document}