This is pdfeTeX, Version 3.141592-1.21a-2.2 (Web2C 7.5.4)
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LaTeX2e <2003/12/01>
Babel <v3.8d> and hyphenation patterns for american, french, german, ngerman, b
ahasa, basque, bulgarian, catalan, croatian, czech, danish, dutch, esperanto, e
stonian, finnish, greek, icelandic, irish, italian, latin, magyar, norsk, polis
h, portuges, romanian, russian, serbian, slovak, slovene, spanish, swedish, tur
kish, ukrainian, nohyphenation, loaded.

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LaTeX Warning: Reference `eqn:ekexp' on page 1 undefined on input line 35.


! LaTeX Error: \begin{document} ended by \end{enumerate}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.42 \end{enumerate}
                    
! Extra \endgroup.
<recently read> \endgroup 
                          
l.42 \end{enumerate}
                    
[1] (./6.aux)

LaTeX Warning: There were undefined references.

 )
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Output written on 6.dvi (1 page, 2316 bytes).
Transcript written on 6.log.