I don’t really understand what you try to do. EXP() gives you e^(the number in the brackets). So your base number (from your example) is not 2 but e=2.178….
I’m sorry but what you describe is just the square of a number. EXP() gives you the exponential function! It is e^(x) and this is approx 2.178^(x). Look at the pic attached. Here you see e^1=e=2.178…
(PS: added the return line just to display it in ProBuilder, but obviously if this is to include in a ProOrder piece of code you’d get rid of the return line)