3^2 + (5 - 2) ⋅ 4 - (6/3)

First you would start out by doing 3 to the second power and you'd get 6. then you subtract 2 from 5 and get 3 now add 6 and 3 and get 9. now 6/3 is 2 and 4-2 is 2. 9•2 is 18 which is your answer