Some of the coolest features in Facebook Messenger exist buried under the surface. You have to really look for them. For instance, did you know that it comes with baked-in support for mathematical formulas written in LaTex? Check it out: Messenger also supports longer equations. Because of the size constraints (Messenger typically occupies a small box at the bottom of your browser), when you write a longer equation, it is displayed with a scrolling bar. Oh, another thing: Facebook only lets you write equations on the web. That’s fair enough, because I can’t imagine ever wanting to write Latex from…

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