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Per MOS:RADICAL, <math>...</math> markup is generally preferred to render expressions using the radical symbol √, but it does not work with the Media Viewer extension, which is used to view images full-screen on mobile devices. So this template should only be used in image captions until T263572 is fixed.
For example: can be produced with <math>\sqrt[4]{1 + 2x}</math>.
![{\displaystyle {\sqrt[{4}]{1+2x}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/177e69181cf38b62d9cf5826caca4da5ea273eab)
