Natural display: a fraction with roots

With natural display, fractions and radicals are typed the way they look. Type $\displaystyle \frac{2+\sqrt{2}}{1+\sqrt{2}}$. Press : a fraction appears with two empty boxes. Type 2, press , then , and type 2 under the radical. Press once to leave the radical, and again to move down to the bottom of the fraction. Type 1, press , , and 2. Press . The answer is $\displaystyle \sqrt{2}$, shown in radical form.

▶ Watch this step in the video (8:56)