How do you evaluate #20 + ((17 + 3) * 6^2)#?
Using PEMDAS, we first look at the parentheses. There is another pair of parentheses inside the first one, so we solve the inner one first.
Now in the first pair of parentheses we look for any exponents, then solve it.
After exponents we look for multiplication or division.
The parentheses are fully solved so now we look for any exponents, multiplication, and division. There is none. So we look for addition and subtraction and then solve.