Hi Beni,
Sorry, don't know of any other way "...to turn the this compatibility mode on?" The only other thing I can think of to check is, do you have any, Additional equation delimiters, set? Mine is empty.
Not sure if it would make a difference, but what do you have in the box for MathJax URL and in the box for MathJax configuration.
On Moodle 3.2.5+ My MathJax URL is - https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js
And my Mathjax configuration is:
MathJax.Hub.Config({
config: ["MMLorHTML.js", "Safe.js"],
jax: ["input/TeX","input/MathML","output/HTML-CSS","output/NativeMML"],
extensions: ["tex2jax.js","mml2jax.js","MathMenu.js","MathZoom.js"],
TeX: {
extensions: ["xypic.js","mhchem.js","color.js","AMSmath.js","AMSsymbols.js","noErrors.js","noUndefined.js"],
},
menuSettings: {
zoom: "Double-Click",
mpContext: true,
mpMouse: true
},
errorSettings: { message: ["!"] },
skipStartupTypeset: true,
messageStyle: "none"
});
The same settings in my Moodle 3.3.2+ displays the equations as expected.
Since I did not mention it before, just want to make sure that you know, your examples DO work correctly for me.