1. The user asked about an Excel formula, which is not a math problem but a spreadsheet function. 2. Excel formulas are used to perform calculations or operations on data within cells. 3. Common Excel formulas include SUM, AVERAGE, IF, VLOOKUP, and CONCATENATE. 4. For example, the SUM formula adds numbers: =SUM(A1:A5) adds values from cells A1 to A5. 5. To create a formula, start with an equals sign (=), then type the function name and arguments inside parentheses. 6. Excel formulas can include cell references, numbers, operators (+, -, *, /), and functions. 7. If you have a specific Excel formula question, please provide details so I can assist further.