I see you post from Steemit, and yes having 3 tag streams is annoying, add to that other languages too!

However, they have all been merged into the Mathematics forum on chainBB:
https://beta.chainbb.com/forum/math

:-)

However, to avoid the same post in multiple forums, one of the maths tags must be the first - which means there will still be posts left out of the forum to swim in the Streemit stream.

The system is also not very robust in that people still make typo errors and end up in a weird tag of their own!
Check out #m ;-)