What is the effective way to display calculations in word

Partial from Internet:

To view formulas in a table in Word for a single cell in a table, select the formula in the table cell. Then press the “Shift” + “F9” keys on your keyboard to toggle its field code. To view all the formulas in the entire table, first click into the table. Then press the “Alt” + “F9” keys on your keyboard, instead.