When programming, I always parenthesize the heck out of everything. Not only does it guarantee that you get the intended answer, it automatically documents what you are trying to do, which is highly useful when what you intended isn't what was called for! (Voice of experience.) It's not a math problem, despite arguments about inverses, etc. It's a problem of the convention we obey not allowing for the implicit multiplication to have a different precedence. I suspect this is because the acronyms get less memorable and crisp if you make them unambiguous.