I got to play with Katex (pronounce Katech c.f., Latex) as a maths equation renderer in my TiddlyWiki efforts.

I thought I would share the equivalent for Xara Desktop applications.
All a bit rough and ready so it is open to development suggestions in this thread.

CSS JS - Katex.xar

Add the Placeholder code to a Text Area allows you to control the font, colouring and size very easily.

I am currently stuck with how to include Chemical Elements.

UPDATE: you can use <span>\(\pi\)</span>, escaped round brackets as well and seeming remove the render part of the code in the Head as well.

Acorn