[NTG-context] modules or packages for abbreviations for common math commands

Dear ConTeXt folks, is there a module or a package people have created for common things used in mathematics. `\set{ a, b, c }` for a set. `\EV{X}` for the expected value. `\P{ X = ½ }` for the probability. … If not, maybe a module could be created and maintained together to not reinvent the wheel. Thanks, Paul