Personally I've always found relying on operator precedence uncomfortable and usually add always parenthesis even when they are not strictly needed, this was th

Personally I've always found relying on operator precedence uncomfortable and usually add always parenthesis even when they are not strictly needed, this was the case even back in high school when we were doing calculations with then fancy graphing calculators. I just find the extra degree of confidence worth the slight extra effort and noise. Maybe I'm just a belt and suspenders type of guy. These days for actual physical calculators, and on phone, I've transitioned to RPN which neatly transcends such petty ambiguity problems.