IF this one is not in your top 10 Excel formulas you are missing out. Simply use the minus sign -. The best way to speed up your day-to-day Excel work is to learn some useful shortcuts both with the keyboard and your mouse or touchpad.
As you can imagine this formula can get quite long.
Simply use the SUM function to shorten your formula. Another example First Excel calculates the part in parentheses A2A3. Excel is quite intelligent in that when you start typing the name of the function a pop-up function hint will show. Next Excel adds the value of cell A3 to this result.