I'm using Ubuntu 24.04, Chrome and Wikimedia 1.46.0-alpha (83df57f) 08:35, 13. Feb. 2026 mit MathJax rendering.

The rendering of the formular
<math>f'(x) = \frac{\mathrm d}{\mathrm dx} f(x) = \lim \limits_{\Delta x \to 0} \left( \frac{\Delta f(x)}{\Delta x} \right)</math>
is wrong with MathJax rendering. I am not sure there the problem is in detail. After removing f'(x) = from the formular the error do not occure.

This was found at https://de.wikipedia.org/w/index.php?title=Hilfe:TeX&oldid=264108844