This method works in Microsoft Word 2007 or. On the Table Tools Layout tab in the Data group click Formula. Use your finger stylus or mouse to write your equation.
Position the cursor where you want to paste a formula.
To use a built-in formula select Design Equation. Position the cursor where you want to paste a formula. You can use simple formulas in Microsoft Word such as addition subtraction - multiplication or division. SUM ABOVE adds the numbers in the column above the cell youre in.