Regardless of everyone's ability or inability to operate their $5 calculator properly (that's an argument for another day!)
-2^2 , as written, is interpreted as (-2) ^ 2. The correct answer is 4.
That is not my opinion, that is fact. Clear as day, no argument. in this case (-2) is a number, just as 2 is.
You are incorrect sir.
Please see me after class.