MS Excel
To create a formula, you first:

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
Type the equals sign (=) to tell Excel that you’re about to enter a formula

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MS Excel
How do you insert a row?

Right-click the row heading where you want to insert the new row and select Insert from the shortcut menu
All of the listed here
Select the row heading where you want to insert the new row and click the Insert Row button on the standard toolbar
Select the row heading where you want to insert the new row and select Edit >Row from the menu

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