The power of a number can be calculated, using a simple VBScript code through the "Run VbScript" Action.
The following code can be used:
Wscript.Echo %Number% ^ %X%
Base -> %Number%
Exponent = %X%
Note: The variables %Number% and %X% are variables that have been already defined.
The result of the "Run VBScript" Action is stored into the text variable %VBScriptOutput%. That variable has by default an empty row at the end (after the result).
So, a "Trim Text" Action would be useful to remove that empty row.