A) Addition
B) Subtraction
C) Multiplication
D) Exponent

3+16 divided by 4

4 x 7 - 2 x 6 divided by 3

5 (power of 2) - 4 x (2 power of 3) -3)

(-3 (power of 4) divided 9 x (4-5 (power of 3) + 8