order of operations ... PEMDAS
...Parentheses, Exponentiation, Multiplication, Division, Addition, Subtraction
e - [(r/r) + 6]
e-r/r+6
r=-9
e=6
6 --9/-9+6=-15/15=1
Did I do this right
2 answers
(e-r)/(r+6) = (6 - -9)/(-9+6) = 15/-3 = .....