I don't understand your question - it's very clear that you need to do the exponentiation before the addition...
Is the P E M/D A/S convention necessary to be compatible with exponent notation?
If we write:
then wouldn't it be impossible to reverse the priority of exponents and addition if we use our current notation for exponents?
However, I don't see how we could do something similar with exponents.
It is not necessary because you can make a convention to do M/D after A/S. However, our notation for exponents does seem to imply that exponentiation has the highest priority.Is the P E M/D A/S convention necessary to be compatible with exponent notation?