just remember BPEMDAS
Brackets
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
You do what's inside the brackets first, but since there are parentheses in the brackets you do what's inside the parentheses then you divide that by 2 then add that by 2 then multiply that by 3.
3•[(30-8)÷2+2]
3•[(22)÷2+2]
3•[11+2]
3•[13]
=39
