There is no elegant built-in way, yet. There are several ideas, but
no obvious winner. This issue requires a champion to solve the
technical and aesthetic issues and implement a generic solution.
Here's the to-do list entry.
There are several quick & dirty ways to include equations in
documents:
- For HTML there is MathML but its rendering is still quite broken (or
absent) on most browsers. An example of raw MathML is here.
- If you use LaTeX output only, a simple way is to use the "raw"
directive; examples are here.
- Images of the equations can be used, typically generated by TeX.
Beni Cherniavsky has written some preprocessing scripts for
making inline TeX (for LaTeX and other [HTML etc.] output) math much
easier; instructions here.
- Here is an example of potential itex math markup.