meh.. the TI-85 is almost 20 years old and was replaced by the TI-86.. the 86 returns 288 as does the TI-83+ and TI-89 that I own.

Windows vista calculator, google calculator, and bing calculator all also give the answer 288.

Google

48/2(9+3) - Bing

we'll just have to agree to disagree. It wouldn't make much sense to have an order of operations if it were necessary to add brackets to everything to make it unambiguous... in that case the order of operations might as well read 'B', then do everything else left to right. Another point is that the field of mathematics is such that there is usually exactly one correct answer and it would blow my mind if something as relatively simple as this could be (correctly) interpreted in more than one way.