Just type in the variables Scratch Cat asks you to type. I can't believe I did this so quickly and yet it gives an accurate answer. Please, don't bother trying to do any power other than 2 or 3 unless you want some crazy wrong answer.
Thanks to @gosoccerboy5 and @santi2903456 for helping me manage our propaganda :D By the way: I made this because it may help others who might just REALLY need the square or cube of a complicated number.