In my day we always used brackets. There was never any dispute. What idiot decided it was a good idea to replace clarity with confusion?

That’s what I wasn’t sure about but the order of the addition and subtraction is done from left to right. So the subtraction happens before the addition once any multiplication, brackets or division is out of the way. I think

Doesn’t matter what order you do the addition and subtraction in, same applies to the multiply and divide. Brackets first, the multiply and divides, the the adding and subtracting.