the pow of factor
pow ( expression )
Factor and expression yield lists of integers, numbers, or complexes.
The pow function returns the value of the power tower of the numeric values passed to it. For example, pow(4,3,2) evaluates to 4^3^2 or 262144.
If all the values are integers or numbers, a number is returned. If any value is a complex, a complex is returned.
This is the infinite-arity version of the ^ operator.