I’m including a reference to all of the MathML tags. This is taken directly from this Mozilla page which is released under a Creative Commons License. I may add my own annotations in a future edition, but for now it’s just “as is” without commentary.
This is an alphabetical list of MathML presentation elements.
The term presentation markup is used to describe the layout structure of mathematical notation whereas content markup provides the underlying mathematical meaning and is not supposed to be rendered by the MathML parser (see bug 276028). If you want to learn more about content markup you should consider Chapter 4 in the MathML 3 specification.
<maction>(Binded actions to sub-expressions)
<mglyph>(Displaying non-standard symbols)
<mmultiscripts>(Prescripts and tensor indices)
<mscarries>(Annotations such as carries)
<mscarry>(Single carry, child element of
<msgroup>(Grouped rows of
<msline>(Horizontal lines inside
<msqrt>(Square root without an index)
<mtable>(Table or matrix)
<mtd>(Cell in a table or a matrix)
<mtr>(Row in a table or a matrix)