It is sad to see that science and math is never given enough attention in Android platform. Maybe this is an easy problem, but I\'m a total dude in javascript so I\
jqMath is a JavaScript library like MathJax, but much smaller, simpler, and faster. If you don't need all of LaTeX, you might like it. It should work fine on Android.
It is just a suggestion, I have no idea what errors or advantages you might have if you use MathJax.
MathJax is much bigger and more complicated than jqMath, and roughly 5 times slower.
Working JSFIDDLE: http://jsfiddle.net/sinhayash/gWWB5/1/
For \sqrt{b^2-4ac}
you can have this code: √(b^2-4ac)
You can easily use string handling in javascript to convert strings to the jqMath format and easily display it