title: Where can I find API which support TEX to create equation?
body: <p>I know I can use Google Chart API such as  <a href="http://chart.apis.google.com/chart?cht=tx&amp;chl=" rel="nofollow">http://chart.apis.google.com/chart?cht=tx&amp;chl=</a> x = \frac{-b \pm \sqrt {b^2-4ac}}{2a}  to create equation,
  but I find it's not very good, do you know more APIs which support TEX to create equation ? Thanks!</p>