There are four math functions which are pretty complex.

• math.erf
• math.erfc
• math.gamma
• math.lgamma

They are implemented in cpython, as can be seen here:
https://github.com/python/cpython/blob/master/Modules/mathmodule.c#L113

The documentation is listed here:
https://docs.python.org/3/library/math.html#special-functions

In rust python, they must be implemented in vm/src/stdlib/math.rs.