MIT course using python:
http://courses.csail.mit.edu/6.006/spring11/notes.shtml

All four scripting languages compared: PHP, Python, Perl and Ruby
http://hyperpolyglot.org/scripting

LaTeX math commands: http://en.wikibooks.org/wiki/LaTeX/Mathematics

http://www.elegantcoding.com/2011/11/eleven-equations-true-computer-science.html