It is possible to input Latex in facebook to input math equations.
Down side is, only viewers using chrome and latex extension installed can view the equations. Other browsers can only see latex code. Anyways, it is better than not having latex at all.
- Go to Google Chrome
- Click on Settings -> Extension
- In the search box (for searching extensions) type “Latex for Facebook”
- Add the extension (chrome will install it for you)
- Go to Facebook and just mark up your latex code by a dollar sign