**Overview of formulas**
https://support.microsoft.com/en-us/office/overview-of-formulas-34519a4e-1e8d-4f4b-84d4-d642c4f63263

A formula always starts with an equal sign (=), which can be followed by numbers, math operators (such as a plus or minus sign), and functions, which can really expand the power of a formula. For example, the following formula multiplies 2 by 3 and then adds 5 to that result to come up with the answer, 11.

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