What are Math communities?
Math communities are online groups where students, teachers, mathematicians and mathemagicians discuss math problems and theory. If you're looking to crack and unsolved problem, or even just get some help on your homework, pick an online community for math to surround yourself with.
About Communities Tagged with "Paid"
These communities cost money to join, which typically means that their members are very dedicated to the topics discussed. These communities are more exclusive, but often times very high quality.