42
3.14159
¯2
∞
3E12
2.8e¯4
0.1e+7
2j3
¯4.3e2J1.9e¯4

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

[
	["number", "42"],
	["number", "3.14159"],
	["number", "¯2"],
	["number", "∞"],
	["number", "3E12"],
	["number", "2.8e¯4"],
	["number", "0.1e+7"],
	["number", "2j3"],
	["number", "¯4.3e2J1.9e¯4"]
]

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Checks for numbers.