Had a moment of insanity and completely forget that Nintex Workflow had a fn-Power inline function.
That, together with choosing not to write some code to make an inline function or a custom action, I decided to make a UDA that would perform a Math Power calculation. Dumb?...oh yes. But hey, I went to the trouble of making it, I might as well post it so that other people don't do the same stupid thing I just did.
No screenshots here....not more explanations. I've spent enough time reinventing the wheel :).
Files to Download
You can download the files below, depending on where you prefer to import your UDAs.
Math Power UDA - NWF (Design) Download - import into the designer
Math Power UDA Download - import into Site Actions->Nintex Workflow 2010->Manage User Defined Actions