[fn-mote]

In my country we teach the same rules in math class. Blaming it on “unary vs binary” was a stretch. Next you’re going to blame it on the lexer for producing the -3 as a single term instead of two. (Which WOULD explain something, but… fix it?!)

In my country we use a horizontal line with a dot above and below to indicate in-line division in lower grades. Exactly like the computer /.

It’s not like there was no precedent here.

[mark-r]

I also learned the line with a dot above and below in my country, the USA. But that was a very long time ago, math teaching has changed immeasurably since my time.

In Unicode it's U+00F7: https://www.compart.com/en/unicode/U+00F7