To answer this question, we need to apply the rules of "PEMDAS".
Thus:
- we first deal with the numbers in the "Parentheses" or brackets
- then we perform the "Multiplication" operation
- and then we perform the "Subtraction" operation
This is done as follows:

- by dealing with the numbers in the parentheses, we get:

- now, by dealing with the multiplication, we have:

- finally, we deal with the subtraction, as follows:
