Using the order of operations (PEMDAS)
3² + (7 - 2) · 4 - 6 ÷ 3
Parentheses
3² + 5 · 4 - 6 ÷ 3
Exponents
9 + 5 · 4 - 6 ÷ 3
Multiplication
9 + 20 - 6 ÷ 3
Division
9 + 20 - 2
Addition
29 - 2
Subtraction
27
The answer is 27 :)
Hopefully this helps! If you have any more questions or don't understand, feel free to DM me, and I'll get back to you ASAP! :)