Math with nath
Nath stands for "natural math". Our nath module is a translation of the nath LaTeX package (by Michal Marvan) to ConTeXt by Giuseppe Bilotta (alias Oblomov). Is it built ontop of the amsl module.
\usemodule[nath]
The documentation in the source is still about LaTeX, so I (Hraban) don't know what I should tell you here, sorry.