Here are wordclouds for some of my most popular Twitter accounts. Thanks to Mike Croucher for creating these images. He explains on his blog how to create your own Twitter wordclouds using R.
My most popular account is CompSciFact, tweets about computer science and related topics.
AlgebraFact is for algebra, number theory, and miscellaneous pure math. (Miscellaneous applied math is more likely to end up on AnalysisFact.)
ProbFact is for probability.
DataSciFact is for data science: statistics, machine learning, visualization, etc.
You can find a full list of my various Twitter accounts here.