What does the term 'expression' typically refer to in mathematics?

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The term 'expression' in mathematics indeed refers to a statement that consists of numbers, variables, and the operations performed on them, such as addition, subtraction, multiplication, and division. An expression does not include an equal sign, which distinguishes it from equations. For instance, "3x + 2" is an expression because it combines variables and constants through addition and multiplication without asserting equality.

This definition emphasizes the nature of expressions as components that can be evaluated or simplified, as opposed to representing a relationship of equality between two distinct expressions, which is what equations do.

Thus, the correct choice aligns with the fundamental understanding of what constitutes an expression in mathematical terminology.

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