Its use is similar, but not as robust as the Equation toolbar. Word might not be the go-to for writing mathematical equations, but it’s capable of managing most math symbols, constructs and formats.

Write your equation in the Math Input Control dialog and preview it. Click Insert to enter it in the document. You can also do math from the Draw tab on the Ribbon.

Open your Word 2010 document and position the cursor wherever you want the number and exponent to appear. Click the "Insert" tab at the top of the screen, then click the "Equation" button, found ...

As you click on the Equation option, a box will appear in your Word document to enter an equation. Now, click on the Script option on the Ribbon. You will see different options.

3] Create fractions with an equation. If the above methods are not good enough for you, then using equations is a great way to write fractions. For that you will have to use the Equation Mode in Word.

When I click on an equation in Word, it starts installing something and asks for a disk with MS office. When I click cancel a few times, the equation editor finally appears and everything works ...