What we were taught and what I’ve seen a lot in the German speaking world was “punkt for strich”, “dot before line” since the addition and subtraction symbols are written with lines and the mult/div with dots (⋅ and :).

The fact that parentheses/brackets are always top priority was taught separately (even before multiplication iirc) and once we got to powers/roots it was just quickly mentioned that they have higher prio than mult/div/add/sub.

I love you.

The “5 seconds after they started moving” is relevant. If we assume this takes place on Earth (i.e. on the surface of a sphere with a set pair of north/south poles), the angle between the two vectors changes depending on their current position.

If it’s not on the equator, it’s also slightly up to interpretation if “Due East” means they’ll turn to stay on the same latitude, always adjusting to stay moving east forever or if they’ll do a great circle. In the former case, the north moving one will eventually get stuck at the north-pole too instead of continuing their circle around the globe. Most likely not within 5 seconds though, unless the place they started was within 25 feet of the north-pole.

To actually do the math we’ll need to know (or somehow deduce) where “the place where everything about them began” is though.

At least yours were taught by actual people.

My girlfriend showed me recently that one of her profs made an AI clone of himself (voice and visual) and distributed prerecorded lessons that way. Who knows if he’s even writing the script for it. Probably not.

Even within Swiss German itself, the people in the Canton of Valais speak such a strong dialect (actually a group of dialects) that most of the rest of Swiss German people don’t understand them.