A day late and in the wrong year, I've come up with a notation idea for #mathsjam: there should be a different zero symbol to show (lack of) precision.
e.g. 3xxx instead of 3000 when figure is correct to the nearest 1000.
A Mastodon instance for maths people. The kind of people who make \(\pi z^2 \times a\) jokes.
\) for inline LaTeX, and
\] for display mode.