\documentclass[12pt]{article}
\usepackage{amsmath}
\topmargin=-.6in
\oddsidemargin=-.3in
\setlength{\textwidth}{7in}
\textheight=9in
\alph{enumii}
\pagestyle{empty}
\parskip=.2in
\newcommand{\degree}{$^{\circ}$}
\newcommand{\dif}{\mathrm{d}}
\setlength{\parindent}{0pt}
\setlength{\unitlength}{.3mm}