Add an equation to the equation gallery Select the equation you want to add. Note the formula in the formula bar while the result we would expect is in cell B2. Choose Insert Equation and choose the equation you want from the gallery.
Click on the Insert tab Equation command Equation Editor appears type F within parenthesis x then equal sign then from the Script structure select the Subscript fill the blanks with a and 0.
Because Equation Editor isnt available in Excel for the web you wont be able to insert them. Also learn how to work with exponents and basic mathematical functions. Hold the left click of the mouse drag the mouse down to the end of the page. Then insert a plus sign.