Another try...

Trying after a long while to see if I can improve the situation for mobile devices. Here, as a test, is an inline equation, \( y = x^2 \), and then, next, a displayed one \[ y = \int^x y'(\xi)\, d\xi \] These used \-escaped versions of ( ... ) and [ ... ] (not dollar signs). This update is based on a google search (31 Dec 2025) where an AI response to the search suggested using async='async' src='https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js' type='text/javascript'>  inside < - script ... > and < / script> tags immediately before /head, and changing the mobile view to custom. I commented out the earlier MathJax addition as mentioned in the earlier posts. This seems to now work on my mobile at least!