mfenced: open, close, separators	$\left(1,2\right)$
menclose: notation	$\overline{)\text{menclose}}$
mfrac: bevelled, linethickness	$\frac{a}{b}$
mfrac: numalign	$\frac{1}{234}$
mfrac: denomalign	$\frac{123}{4}$
mmultiscripts: subscriptshift, superscriptshift	${}_e{}^{f}a_b^c$
msubsup: subscriptshift, superscriptshift	$a_b^c$
msub: subscriptshift	$a_b$
msup: superscriptshift	$a^b$