What is [12-(6^2-6)]÷2

Question

I don't know this answer help?????!?!?!?!

Answer 1

[12-(6^2-6)]÷2
[12-(36 -6)]÷2
[12-(30)]÷2
[-18]÷2
-9

Answer 2

Thank u

Answer 3

-18 + 2 = -16.
The student will probably notice the error.