Hello!
To solve this , we will use PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction). We will do so below.
First we solve the parentheses.
7·(8^2)-3^2
7(64)-3^2
Next, we solve the exponent.
7·(64)-9
The next thing we have is multiplication. We multiply the numbers right next to each other, going left to right, as shown below.
448-9
Now, we subtract.
439
Therefore, our answer is 439.
I hope this helps!