MS Excel
You can set Page Border in Excel from

From Border tool in Formatting toolbar
You can not set Page Border in Excel
From Border tab in Farmat cells dialog box
From Line style tool in Drawing toolbar

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MS Excel
To create a formula, you first:

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

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