Just nit-picking, but ()'s cannot remove ambiguity from such an equation, because there is no ambiguity to begin with. The order of operations clearly states how "-2^2" (or any other equation for that matter) should be interpretted. Math is a form of logic, and logic can't say anything for certain if there is any ambiguity in one of the steps. ()'s are a part of the language of math and, properly used, can only change the meaning of the equation, not clarify it. "Properly used" here means not just thrown in for fun. In fact, extra ()'s can make an equation more difficult, or at least more time consuming, for a person to sort out. Simple example: (((1) + 1) + 1) = 1 + 1 + 1. None of the ()'s make any difference to the outcome, they just make it take slightly longer to read. Again, I'm only having fun splitting hairs here. My opinion on the problem itself was already summed up in an earlier post.
