Oh, he's still there. Try: http://www.educat.hu-berlin.de/~voss/LaTeX/mathstuff/mathmode.phtml#equn_2
this math page is out of date. Look at
http://www.perce.de/LaTeX/math/Mathmode-TeX.pdf
Herbert
Oh, he's still there. Try: http://www.educat.hu-berlin.de/~voss/LaTeX/mathstuff/mathmode.phtml#equn_2