@argome321,
I can see how it works both ways. I want to know why you think the bracketing is incorrect. Why is it -10 +/- (60x0) and not -70 x0. We can agree on the first and last parts of the sum -10 and 10 respectively. Where we differ is that you insist on multiplying -60 by zero before it's added/subtracted to/from -10. Why do you not multiply by zero after adding/subtracting -10 and -60 together. If there were brackets I would agree with you, but there aren't any so I don't.
-10 +0 + 10 =0
(-10-60) x0 + 10 =10
It's all down to whether you multiply -60 or -70 by zero. You seem sure it's -60. I'm not, and I want to know why you're so sure, given that there are no brackets. Just saying my brackets are incorrect is not an answer.
If you want we can take this to another thread or pm it.