deletions | additions       diff --git a/preamble.tex b/preamble.tex  index 98415ea..54cd643 100644  --- a/preamble.tex  +++ b/preamble.tex 
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\documentclass{article} \documentclass{report}  \usepackage{amsfonts,amsmath,amssymb}  \usepackage{graphicx}  \usepackage{color}