Takes a function (or module and function names) and a set of arguments for that function, and tries to fetch the previous result of running that function from the in-memory cache, using the MFA (module name/function name/arguments used) to generate the cache key. If it's not in the cache, it executes the function, and caches and returns the result.

It removes the entry associated with a key from the cache.

It removes the result of a given function from the cache.