How about a vote? on this subject...
How is it used in real life at an professional level?
I don't think it would hurt to ask a math teachers (Highschool, Collage or
University)
There has to be a way that is a accepted standard.
Here is a way to think about the problem...
5 - 3 = 5 + -3
Just some thoughts
Have a nice day
Ambis
P.S.
My vote would be on -3^2=9
