\documentclass[11pt]{article}
\usepackage{array,calc,fancyhdr,lastpage}
\usepackage[hmargin=.5in,vmargin=.75in,
            footskip=.5in,headsep=.5in-\headheight]{geometry}
\usepackage{amsmath,amssymb}

\flushbottom  % stretch text to fill up page
\reversemarginpar  % marginal notes on the left

% Common formatting macros for CSC373.
\input{macros-373}

% To indicate number of marks for each question/subquestion.
\newcommand*{\worth}[1]
   {\mbox{}\marginpar{\raggedleft[#1]}\ignorespaces}

% Headings.
\pagestyle{fancy}
\let\headrule\empty
\let\footrule\empty
\lhead{{CSC\,373}}
\chead{{\scshape Assignment \#\,1}}
\rhead{{Summer 2013}}
\lfoot{{Dept.\ of Computer Science,
    University of Toronto (St.~George Campus)}}
\cfoot{{}}
\rfoot{{Page \thepage\ of \pageref{LastPage}}}


\begin{document}

\vspace*{-5ex}

\noindent
\strong{Worth:}  10\%
\hfill
\strong{Due:}  Thursday June 6, 11:59pm.

\vspace{2.5ex}

\noindent
\strong
   {Remember to write
    your \altemph{full name}, \altemph{student number}, and
    \altemph{CDF/UTOR email address}.}

\noindent
\altemph
   {Please make sure that the work you submit must not contain someone else's words or ideas.
    Then, to protect yourself,
    list on the front of your submission
    \strong{every} source of information
    you used to complete this homework
    (other than your own lecture and tutorial notes,
    and materials available directly on the course webpage).
    For example, indicate clearly
    the \strong{name} of every student with whom you had discussions,
    the \strong{title} of every additional textbook you consulted,
    the \strong{source} of every additional web document you used,
    \etc.}

\noindent
\rule{\textwidth}{.5pt}\\[1.25ex]
For each question, please write up detailed answers carefully.
Make sure that you use notation and terminology correctly, and
that you explain and justify what you are doing.
Marks \strong{will} be deducted
for incorrect or ambiguous use of notation and terminology, and
for making incorrect, unjustified, ambiguous, or vague claims
in your solutions.\\
\rule{\textwidth}{.5pt}
\begin{enumerate}


\item  \worth{10}
    Question 1 will follow.

    \begin{description}
    \item[Parameters:]
        The parameters ...
    \item[Goal:]
        The goal of this question.
    \end{description}
    \begin{enumerate}

    \item
        Show that ...

    \item
       Show that ...

    \end{enumerate}

%You can add your solution here.
{\bf Solution:} Your solution! Here I add some random equations. You can see how we can generate equations in \LaTeX.\\
An equation in the same line: $a = \frac{b^2+\sqrt{c^2+d^2}}{\log e}$.\\
An equation in a different line: $$S_i \subseteq S'_i \subseteq S_i \cup \{I_{i+1}, I_{i+2}, \cdots, I_n\}$$

I have added some links to \LaTeX \ tutorials on the course page. 

% end of solution for question 1.

\end{enumerate}

\end{document}