MS Excel
To create a formula, you first:

Enter the formula using any input values and the appropriate mathematical operators that make up your formula
Type the equals sign (=) to tell Excel that you’re about to enter a formula
Select the cell you want to place the formula into
Choose the new command from the file menu

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MS Excel
To center worksheet titles across a range of cells, you must

Widen the columns
Select the cells containing the title text plus the range over which the title text is to be enfettered
Select the cells containing the title text plus the range over which the title text is to be centered
Format the cells with the comma style

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