Natural display: a fraction with roots

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

▶ Watch this step in the video (8:31)