4 5 x y means x is less than or equal to y. Mathematics is a universal language and the basics of maths are the same everywhere in the universe. In mathematics an inequality is a relation which makes a non-equal comparison between two numbers or other mathematical expressions.
The word unity carries many meanings in the English language but it is perhaps best known for its most simple and straightforward definition which is the state of being one.
The definition and the value of the symbols are constant. Information and translations of not exceed in the most comprehensive dictionary definitions resource on the web. Exceed means to go over a limit. To be larger greater than something.