E.g., compare https://de.m.wikipedia.org/wiki/Maxwell-Gleichungen#Makroskopische_Maxwell-Gleichungen and https://de.wikipedia.org/wiki/Maxwell-Gleichungen#Makroskopische_Maxwell-Gleichungen.

Mobile has

<img class="mwe-math-fallback-image-inline image-lazy-loaded" src="https://wikimedia.org/api/rest_v1/media/math/render/svg/57b44b13cbdea70229e3a747ebb688630c482905" alt="{\vec {D}}:={\varepsilon _{0}}{\vec {E}}+{\vec {P}}" style="width: 14.201ex;height: 3.176ex;">

Desktop has

<img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/57b44b13cbdea70229e3a747ebb688630c482905" class="mwe-math-fallback-image-inline" aria-hidden="true" style="vertical-align: -0.671ex; width:14.201ex; height:3.176ex;" alt="{\vec {D}}:={\varepsilon _{0}}{\vec {E}}+{\vec {P}}">

Note the inline vertical-align property in the latter which ensures that the image's baseline meets the surrounding baseline.