$\LaTeX$数学公式大全2
$2\ Math\ Constructs$
$\frac{abc}{xyz}$ \frac{abc}{xyz}
$f'$ f'
$\sqrt{abc}$ \sqrt{abc}
$\sqrt[n]{abc}$ \sqrt[n]{abc}
$\overline{abc}$ \overline{abc}
$\underline{abc}$ \underline{abc}
$\widehat{abc}$ \widehat{abc}
$\widetilde{abc}$ \widetilde{abc}
$\overrightarrow{abc}$ \overrightarrow{abc}
$\overleftarrow{abc}$ \overleftarrow{abc}
$\overbrace{abc}$ \overbrace{abc}
$\underbrace{abc}$ \underbrace{abc}