Thank you for the catch! I actually did have Mathjax linked for the article, but it wasn’t being loaded by your browser because I forgot to use the https version of the script. I’ve just fixed it up and it should be rendering fine now (on the blog - I’m still working out how best to include it here in the forums when the site content is pulled in to a post).
I’m going to look at @paperdigits pull request in the morning. It’s 3AM here and I got out of bed just to fix this issue - see how much this community means to me?! 
Back to 
!