# Make “#+BEGIN_EXPORT latex” also exported to html (orgmode)

I know that placing latex code in the main text body solve my issue: the latex code is taken into account both when exporting to latex and to html. However, I like to use Latex blocks because of the syntax highlighting (usefull for long equations etc.).

Does anyone knows a way to make this block also treated by MathJax when exported throught org-export:

#+begin_export latex
$$\left\{ \begin{array}{ll} \dfrac{\partial C(x, t)}{\partial t} = \vec{\nabla} \cdot \left( D(x)\vec{\nabla} C(x,t) \right) \quad \forall x\in\Omega \\ \dfrac{\partial C(x)}{\partial \vec{n}} = 0 \quad \forall x\in\partial\Omega \\ C(x, t=0) = C_{init}(x) \end{array} \right.$$
#+end_export

• I don't know of a simple way. You may be able to write a function that deletes the #+begin/end_export lines and add it to either org-export-before-processing-hook or org-export-before-parsing-hook but I have not tried it, so no guarantees. – NickD Jan 17 at 1:23
• Can't you just get rid of the #+begin/end_export blocks so it works for both? If syntax highlighting is all you want, I think you just (setq org-highlight-latex-and-related t). – John Kitchin Jan 18 at 1:33
• Good catch about the variable, but I think something like this is needed: (setq org-highlight-latex-and-related '(native)) per the doc (and I had to revert the buffer to get it to show). – NickD Jan 18 at 21:29
• Well, it does not work for me... thanks for your help anyway :) – Antoine Collet Jan 21 at 19:36