(42)
(3.14159)
(3e5)
(0.8E-12)
(3.9e+2)
(0xbadface)
(0XBADFACE)

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

[
	["expression", [
		["punctuation", "("],
		["number", "42"],
		["punctuation", ")"]
	]],
	["expression", [
		["punctuation", "("],
		["number", "3.14159"],
		["punctuation", ")"]
	]],
	["expression", [
		["punctuation", "("],
		["number", "3e5"],
		["punctuation", ")"]
	]],
	["expression", [
		["punctuation", "("],
		["number", "0.8E-12"],
		["punctuation", ")"]
	]],
	["expression", [
		["punctuation", "("],
		["number", "3.9e+2"],
		["punctuation", ")"]
	]],
	["expression", [
		["punctuation", "("],
		["number", "0xbadface"],
		["punctuation", ")"]
	]],
	["expression", [
		["punctuation", "("],
		["number", "0XBADFACE"],
		["punctuation", ")"]
	]]
]

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

Checks for numbers inside expressions.