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