>>> "Uwe" == Uwe Brauer <oub@mat.ucm.es> writes:

   > Hi

Ok I followed the instructions in
http://orgmode.org/manual/Working-with-LaTeX-math-snippets.html#fn-1

First I tried the png solution
 #+OPTIONS: tex:dvipng

I attach the solution together with the pdf file I generated converting
org to latex. The difference is huge. Then I installed 
MathToWeb.
And 
LaTeXML

Set   #+OPTIONS: LaTeX:t

Mathtoweb was a bit better than png but not convert all of the
constructions.

Latexml confused to convert any math.

Quite annoying I'd say.