MS Excel
To create a formula, you first:

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
Enter the formula using any input values and the appropriate mathematical operators that make up your formula

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MS Excel
To view a cell comment

Click the edit comment command on the insert menu
Click the comment command on the view menu
Click the display comment command on the window menu
Position the mouse pointer over the cell

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