 | \widetilde{abc} |  | \widehat{abc} |
 | \overleftarrow{abc} |  | \overrightarrow{abc} |
| abc | \overline{abc} | abc | \underline{abc} |
 | \overbrace{abc} |  | \underbrace{abc} |
 | \sqrt{abc} |  | \sqrt[n]{abc} |
| f′ | f’ |  | \frac{abc}{xyz} |
| | \widetilde{abc} | | \widehat{abc} |
| | \overleftarrow{abc} | | \overrightarrow{abc} |
| abc | \overline{abc} | abc | \underline{abc} |
| \overbrace{abc} | | \underbrace{abc} |
| \sqrt{abc} | | \sqrt[n]{abc} |
| f′ | f’ | | \frac{abc}{xyz} |