This is pdfTeX, Version 3.1415926-2.3-1.40.12 (TeX Live 2011) (format=pdflatex 2011.7.3) 29 JAN 2013 22:22 entering extended mode \write18 enabled. file:line:error style messages enabled. %&-line parsing enabled. **GRExam2013.tex (./GRExam2013.tex LaTeX2e <2009/09/24> Babel and hyphenation patterns for english, dumylang, nohyphenation, ge rman-x-2009-06-19, ngerman-x-2009-06-19, afrikaans, ancientgreek, ibycus, arabi c, armenian, basque, bulgarian, catalan, pinyin, coptic, croatian, czech, danis h, dutch, ukenglish, usenglishmax, esperanto, estonian, ethiopic, farsi, finnis h, french, galician, german, ngerman, swissgerman, monogreek, greek, hungarian, icelandic, assamese, bengali, gujarati, hindi, kannada, malayalam, marathi, or iya, panjabi, tamil, telugu, indonesian, interlingua, irish, italian, kurmanji, lao, latin, latvian, lithuanian, mongolian, mongolianlmc, bokmal, nynorsk, pol ish, portuguese, romanian, russian, sanskrit, serbian, serbianc, slovak, sloven ian, spanish, swedish, turkish, turkmen, ukrainian, uppersorbian, welsh, loaded . (./icphexam.cls Document Class: icphexam 2010/03/16 by Steve Schwartz for BSc and MSci and MSc exams in Physics at Imperial College London; Modelled after exam.cls by Francis J Wright, Queen Mary, U of London ICPHEXAM WARNING: qmarks command works in text and $$ ... $$ constructs. LaTeX backslash-[ .... backslash-] constructs throw a latex error that you can type ' s' to ignore. If you need numbered equations, use the leqno package. Numbered e quations with qmarks also throw ignorable errors. 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