Depends on what kind of expression you are talking about, A mathematical expression, or a normal expression.
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Mathematical
When you combine numbers and variables using operations such as addition, subtraction, multiplication, division, exponentiation, and other operations.
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Normal
A look on someone's face or a word or phase.
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I hope that i helped!
May i have brainliest?
[tex]\huge\boxed{Thanks,\;Plip.}[/tex]
