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\usepackage{amssymb}
\usepackage{mathtools}
\usepackage{times}
\usepackage{fancyhdr}
\usepackage[pdftex]{graphics}
\usepackage{graphicx}
\usepackage{latexsym}
\usepackage{amsmath,amsthm}

\usepackage{ifthen}
\usepackage{xifthen}


\usepackage{cancel}
\usepackage{enumerate}
\usepackage{geometry}


\usepackage{float}

\usepackage{scrextend}
