Can't quite run that yet, because
F# error at line 12:
The namespace 'MathJax' is not defined. (FS39)
F# error at line 17:
The value, namespace, type or module 'MathJax' is not defined. (FS39)
F# error at line 33:
The value, namespace, type or module 'MathJax' is not defined. (FS39)