Follow is now running Mastodon v2.9.2!
The big new feature this time is the single-column layout, which looks more like standard Twitter. It's the default layout for new users. Existing users can switch to it on the preferences page.
Full release notes:

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A Mastodon instance for maths people. The kind of people who make \(\pi z^2 \times a\) jokes.

Use \( and \) for inline LaTeX, and \[ and \] for display mode.