Subscript and superscript (subsup)
Confirm scientific or numerical expressions use
<sub>/<sup>
to accurately convey meaning to assistive tech.
Missing sup in numerical expression:
This paragraph has a numerical expression that lacks a proper
<sup> element:
10*102, i.e. ten times ten to the power of two
Note: Hard to automatically test or detect. Requires a human tester or AI
to determine if a <sup> is necessary.