What is the calculator command of CMD?

Set /A formula \x0d\\x0d\ example set /A 3*9\x0d\ specific usage \x0d\()- grouping \ x0d \~- unary operator \ x0d \ */%- arithmetic operator \ x0d \+- arithmetic operator \ x0d \ -Bitwise and \ x0d \- Bitwise xor \ x0d \ |- Bitwise or \ x0d \ = * =/=% =+=- Assignment \ x0d \&= ^= | =>；; =\x0d\,-Expression delimiter