This is XeTeXk, Version 3.1415926-2.2-0.999.6 (Web2C 7.5.7) (format=xelatex 2010.1.2) 3 JAN 2010 15:20 entering extended mode %&-line parsing enabled. **mathtest.tex (./mathtest.tex LaTeX2e <2005/12/01> Babel and hyphenation patterns for english, usenglishmax, dumylang, noh yphenation, german-x-2008-06-18, ngerman-x-2008-06-18, ancientgreek, ibycus, ar abic, basque, bulgarian, catalan, pinyin, coptic, croatian, czech, danish, dutc h, esperanto, estonian, farsi, finnish, french, galician, german, ngerman, mono greek, greek, hungarian, icelandic, indonesian, interlingua, irish, italian, la tin, mongolian, mongolian2a, bokmal, nynorsk, polish, portuguese, romanian, rus sian, sanskrit, serbian, slovak, slovenian, spanish, swedish, turkish, ukenglis h, ukrainian, uppersorbian, welsh, loaded. ! Undefined control sequence. l.4 \magnification =\magstep1 ? x Here is how much of TeX's memory you used: 4 strings out of 494708 46 string characters out of 1167320 47069 words of memory out of 3000000 3320 multiletter control sequences out of 10000+50000 3640 words of font info for 14 fonts, out of 3000000 for 5000 669 hyphenation exceptions out of 8191 5i,0n,1p,51b,8s stack positions out of 5000i,500n,10000p,200000b,50000s No pages of output.