<x-math>\frac{a}{b}</x-math>
<x-math>\frac{d}{dx}\sqrt{x} = \frac{d}{dx}x^{\frac{1}{2}} = \frac{1}{2}x^{-\frac{1}{2}} = \frac{1}{2\sqrt{x}}</x-math>
<x-math editable>\frac{a}{b}</x-math>
Typing <x-math>\sqrt x</x-math> renders \sqrt x.
<x-math>\sqrt x</x-math>