Inline element for a mathematical equation, expression, or formula. This is an NLM not an APA element.
(#PCDATA | bold | italic | monospace | overline | roman | sans-serif | sc | strike | underline | alternatives | inline-graphic | chem-struct | inline-formula | mml:math | named-content | styled-content | sub | sup)*
Any combination of:
<inline-formula>, <label>, <named-content>, <styled-content>
math3.ent