If you have a WINDOWS system, you can obtain a free copy of MikTex to run
LaTex. Get information from www.miktex.de.
Warning: the download is 21mb.
If you have a MACINTOSH system, you can obtain a copy of OzTex to run
LaTex. Get information from
www.kagi.com/authors/akt/oztex.html.
The University of Minnesota has a site license for
OzTex.