This is a patent lawsuit, not copyright
Those math questions that rely on purposeful ambiguity in order to drive engagement are annoying as fuck. It’s like “congratulations, you just proved that in math (and questions in general) if you’re not clear with what you’re asking, people will get different answers”. What fantastic value! What a novel hypothesis! Now fucking knock it off. I’m tired of literally everyone screaming about how their way is right when it doesn’t fucking matter, the question was asked in a bullshit way in order to piss everyone off.
Bonus, PEMDAS, BEMDAS, PE-MD-AS. It’s a goddamn terrible mnemonic that twists itself in knots to make the acronym work, rather than to make the order of operations clear. Screaming it doesn’t make your shit any clearer anyways.
… why are you boldly speculating on OP’s language status? That’s pulled directly from the article
Checked other sources, the restriction is only in place for three years.