Support for Rendering Cube Roots in Handcalcs

Hi,
I am wondering if there is a way to render cube roots, such as $\sqrt[3]{x}$ using handcalcs. I tried a few approaches, but none seem to work. My current Workaround is to use the exponent $x^{1/3}$.
Is this feature currently supported, or does anyone have a workaround to achieve this?
Thank you for your help!