This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6) (format=pdflatex 2010.1.10)  10 FEB 2010 08:22
entering extended mode
 %&-line parsing enabled.
**macros.tex midterm.tex
(./macros.tex
LaTeX2e <2005/12/01>
Babel <v3.8h> and hyphenation patterns for english, usenglishmax, dumylang, noh
yphenation, ukrainian, russian, bulgarian, loaded.

! LaTeX Error: \usepackage before \documentclass.

See the LaTeX manual or LaTeX Companion for explanation.
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 ...                                              
                                                  
l.4 \usepackage{
                amsmath}
? X
 
Here is how much of TeX's memory you used:
 6 strings out of 94834
 277 string characters out of 1179181
 47689 words of memory out of 1500000
 3288 multiletter control sequences out of 10000+50000
 3640 words of font info for 14 fonts, out of 1200000 for 2000
 212 hyphenation exceptions out of 8191
 5i,0n,5p,47b,14s stack positions out of 5000i,500n,6000p,200000b,5000s
No pages of output.
PDF statistics:
 0 PDF objects out of 1000 (max. 8388607)
 0 named destinations out of 1000 (max. 131072)
 1 words of extra memory for PDF output out of 10000 (max. 10000000)