If you install firefox browser (android), it provides an option to save any page as pdf. Just navigate to the options menu in the top right (just below the new tab button), select "Page" and select "Save as pdf".
The pdf file will then be downloaded to your "download" folder - you may need to give permission. It will preserve the page rendering (including math equations). I cant check on my Max2 yet, but I have tested that it works on my mobile.
Edit: I just tested it on my Max2 and it works. See here for a better description ->
https://support.mozilla.org/en-US/kb...irefox-android