KaTex support in Rocket Chat - rocket.chat

I feel almost stupid to ask this, but how does one enable KaTeX support in Rocket.Chat? I'm using this application in a constructive way to share some math expressions for study with my friends. What I tried so far:
Going through all of the settings in Rocket.Chat. I couldn't find anything KaTeX specific here.
Went to KaTeX.org and tried copy-pasting the scripts in the Install section, under <head></head> in Google chrome developer toolbox.
But, KaTeX simply does not render. Any help or inputs will be super-helpful. I am kind of lost.
Thanks,
Quasar.

You literally have to escape the KaTex syntax like this:
\[ KaTeX Syntax \]
exactly as described by the hint underneath the message box:
Here are some examples: Supported
or
Enjoy!

In the Adminstration menu, go to Settings.
There is a search bar where you can simply type "Katex" which will filter the menu options to "Message" which has the Katex settings

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TFS code review comments syntax

When I type [SomeText](SomeOtherText) in a comment in a review in TFS, the text in round brackets disappears and the one in square gets highlighted.
Is there a way to escape it? What can I use it for? Is there documentation somewhere?
EDIT: As it has been suggested by #Chamberlain, the link syntax is Markdown, but yet no link seems to work, what kind of links can I use?
This is using Markdown language. It's similar to html language. []() this means links.
A example as below:
http://github.com - automatic!
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where can I download this code

I find a interesting website:http://www.brightpointinc.com/interactive/political_influence/
I want to learn its visualization using d3.
But when I download it, using right click button-------- save as The download page seems does not work. It seems lack some data, so I get back to the website to download some data, but it lacks some of them, can anyone send me an work version? thanks
As Lars says, your best bet is to look at the source code. To do this, you can use something like Chrome Developer Tools or Firebug for Firefox. I use the latter, so I'll take that as an example.
First, I'd right-click on the visualization itself, and click on Inspect Element with Firebug. This will pull up the HTML, which is only semi-helpful, since it only shows the output rather than the JavaScript code which created it.
To get at the JavaScript, you can use Firebug's Script tab. Most websites have more than one script, so you can hunt through the scripts being used by browsing through the dropdown menu in the second toolbar. The _buildChords.js script looks the most promising; that has some recognizable d3 code in it. You could check out the others to see what else they're calling (since it looks like there might be others - data.js, events.js, and so on).
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I thought it an excellent compromise between WYSIWYG ease of use an markup flexibility.
Does anyone know which editor this was? Or maybe there is more then one editor with this feature?
Here is one that looks promising.
http://koivi.com/WYSIWYG-Editor/
This appears to match your request.
I found one such, and only one. Unfortunately it isn't the one I had seen before and so I'm still looking. They are called What You See Is What You Mean editors - WYSIWYM.
WYMeditor
Also see - http://en.wikipedia.org/wiki/WYSIWYM

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Use TinyMCE http://tinymce.moxiecode.com/
It's pretty easy to use it, look at the examples http://tinymce.moxiecode.com/examples/full.php
Alternatively, you have those:
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=D
Actually I ended up using CodeMirror, it was perfect. Emacs also may be good for other people.

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I'm not familiar with Things, but it sounds like you're describing a Service. Services live in the application menu under Services.
TextEdit.app provides a "New Window Using Selection" service, for example.

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