I propose adding the ability to declare user defined operators, such as operator⊞, allowing users to write `a` `⊞` `b`. The list of allowed operators is drawn from the mathematical operators described in Unicode Technical Report #25, *Unicode* *Support* *for* *Mathematics* (Beeton, Freytag, and Sargent III 2017), with confusables removed. [The operators are otherwise normal functions, found by ordinary lookup rules and ordinary overload](https://www.unicode.org/reports/tr25/tr25-15.pdf) resolution.