For example:

You can use the templates in the math palette to enter special mathematical
formats and symbols (for example, fractions and square roots). The math palette displays when you click or tap inside the answer box:

For example, to insert the template for the mixed fraction 2 1/3 into
your answer, select:

In your answer, you enter 2 in the box on
the left, 1 in the top box on the right, and 3 in the bottom box on the
right:

For more on entering answers using the math palette, see Use the math palette.
You also can use keyboard shortcuts to enter math symbols and functions. For details, see Use keyboard shortcuts.