maths vs mathematical function

maths and mathematical function both are nouns.

Word	Noun	Adjective	Verb	Adverb
maths	Yes	No	No	No
mathematical function	Yes	No	No	No

maths (noun)	mathematical function (noun)
a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement	(mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)