There is only one correct way to calculate 5/2+3. The order is PEMDAS[0]. You divide before adding. Maybe you are thinking that 5/(2+3) is the same as 5/2+3, which is not the case. Improper math syntax doesn’t mean there are two potential answers, but rather that the person that wrote it did so improperly.
[0] https://www.mathsisfun.com/operation-order-pemdas.html