The rules and the acronyms describe different things.

No, they don't.

If you have to make more rules to say M and D are the same,

I didn't make more rules - that's the existing rules. Here's one of many graphics on the topic which are easy to find on the internet...

…that’s one of the two examples you used?

Yes. Did you try looking for one and ramping it up to the most difficult level? I'm guessing not.

IT IS AMBIGUOUS IN THIS POST

No, it isn't. Division before subtraction, always.

ALL EXAMPLES I HAVE SHOWN

None of those have been ambiguous either, as I have pointed out.

That is the problem at hand.

The problem is people not obeying the rules of Maths.

There is no real problem solving in trying to decipher poorly written shit

It's not poorly written. It's written the exact way you'd find it in any Maths textbook.