It is simply a collection or set with operators defined on them. Nothing more, nothing less.
If the structure, with one operator, satisfies the requirements of closure, associativity, identity and invertibility in respect of that one operator, then it is a Group.
A second operator and additional qualities need to be met for it to be a Ring and further conditions are required for a Field.
If you wish to explore the basics, you can look at Group, Ring or Field in Wikipedia but make sure you also put mathematics in your search engine!
It is usually called a set.
expression
A mathematical phrase that contains operations, numbers, or variables is called an algebraic expression. Algebraic expressions consist of constants (numbers), variables (letters representing unknown quantities), and mathematical operations such as addition, subtraction, multiplication, division, and exponentiation. These expressions can be simplified, evaluated, or manipulated using algebraic rules and properties.
A mathematical sentence that contains an equal sign is called an equation
A mathematical statement that contains an equal sign is called an equation.
Each group of variables and numbers separated by operators is called a "term." In mathematical expressions, terms can be combined using operators such as addition, subtraction, multiplication, and division to form larger expressions or equations. Terms can be constants, variables, or products of both.
vinculum
If you mean the symbols like +, -, etc., those are called "operators".If you mean the symbols like +, -, etc., those are called "operators".If you mean the symbols like +, -, etc., those are called "operators".If you mean the symbols like +, -, etc., those are called "operators".
A mathematical phrase made up of numbers and variables connected by addition or subtraction operators is called an algebraic expression. For example, the expression (3x + 5 - 2y) consists of the variables (x) and (y), along with the constants 3, 5, and -2, combined using addition and subtraction. Algebraic expressions do not include equality signs or inequalities.
Set
It is usually called a set.
expression
its called an expression
It is usually called a set.
A mathematical phrase containing numbers and operations is called an expression. Expressions can be joined together with an equals sign to form an equation.
It is called cell
A solution set makes a mathematical sentence TRUE.