I just tried Microsoft Edge browser.
Much of what does not work in Google Chrome DOES work in Microsoft Edge
BUT
the things that DO work in Google Chrome (my normal browser) DO NOT work in Microsoft edge. !!
Look at this :
https://web2.0calc.com/questions/two-parabolas-are-the-graphs-of-the-equations-y-2x_1
IN Google Chrome this is one of the few LaTex things that DOES work
BUT in Microsoft Edge, where more of the LaTex is rendering, this one does NOT !
This is all so weird!!
When I tested with my android phone, using Google Chrome it seemed to render properly. At least the quadratic fomula seemed to be correct.
The LaTex is not rendering properly on EITHER of my computers though.
Could the surrounding dollar signs have something to do with it? ... (I am just thinking out loud here)