Myles English <mylesenglish@gmail.com> writes:

>>> On Wed, 02 Nov 2011 21:38:42 +0000, Myles English said:
>
>>> On Wed, 02 Nov 2011 00:44:57 +0530, Jambunathan K said:
>   >>> 2. mathml - You need to register your command file with -ncf
>   >>> argument.
>   >>> 
>   >>> For example, if I put the mystyle.tex in the same directory as
>   >>> exported .org file and add the -ncf argument to the converter as
>   >>> below
>   >>> 
>   >>> #+begin_src emacs-lisp (setq org-latex-to-mathml-convert-command
>   >>> "java -jar %j -ncf mystyle.tex -unicode -force -df %o %I ")
>   >>> #+end_src
>   >>> 
>
>   >> ncf option is documented here:
>   >> http://www.mathtoweb.com/cgi-bin/mathtoweb_users_guide.pl#Using_newcommand_and_renewcommand
>
>   > I have narrowed the problem I am having down to newcommands that
>   > build on other newcommands, like so ...
>
>   > If I have this in my style file:
>
>   > \newcommand{\pressure}{p}
>   > \newcommand{\capillaryPressure}{\pressure_{c}}
>
> This can work if the style file appears twice in the mathml command:
>
> #+begin_src emacs-lisp
>       (setq org-latex-to-mathml-convert-command
>             "java -jar %j -ncf mystyle.sty,mystyle.sty -unicode -force -df %o %I ")
> #+end_src

Where from you pulled this trick. Unless it is documented somewehere you
are most likely relying on an unintentional side-effect. 

After some googling, I see that there is promising solution using
plastex. The solution is documented in the below file. The customary odt
file is attached as a proof-of-concept.