[ ]
* + - /
% < > =
& | $ !

----------------------------------------------------

[
	["operator", "["], ["operator", "]"],
	["operator", "*"], ["operator", "+"], ["operator", "-"], ["operator", "/"],
	["operator", "%"], ["operator", "<"], ["operator", ">"], ["operator", "="],
	["operator", "&"], ["operator", "|"], ["operator", "$"], ["operator", "!"]
]

----------------------------------------------------

Checks for operators.