It should not lead to any problems, and should only affect unary plus and minus. The parser tries to make student answers painfully unambiguous, so that is why it was set up this way. There are other places where parentheses are used when not specifically necessary, for that reason. But if you want to change it, it should not be a problem.
extra parens when a function outputis negated
This forum has a limit to the number of forum postings you can make in a given time period - this is currently set at 5 posting(s) in 1 day