It's treated as an obvious thing in this document, but I was surprised to learn about the <var> tag for mathematical expressions: https://developer.mozilla.org/

It's treated as an obvious thing in this document, but I was surprised to learn about the <var> tag for mathematical expressions: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/var https://developer.mozilla.org/en-US/docs/Web/HTML/Element/va...