MathJax Support
Mathjax is a modern typesetting library for math and chemistry. AnkiDroid supports Mathjax cards out of the box. Mathjax is configured to expect TeX formatting, with \( and \) delimiting inline equations and \[ and \] for display equations.
To try it out, enter the following into a field:
\(\sqrt{x}\)
and preview the card.
For more details, see Mathjax Support in the Anki Manual.
Previous workarounds are no longer necessary as of AnkiDroid 2.9.