mo: form	$\text{\_}\_\text{\_}$
mo: lspace, rspace	$\text{\_}\_\text{\_}$
mo: stretchy	$\overrightarrow{\text{abcd}}$
mo: accent	$\overbrace{x+y+z}$
mo: maxsize	$($
mo: minsize	$($
mo: symmetric	$\text{\_}(\text{\_}$
mo: movablelimits	$\sum _a^b$
mo: largeop	$$\sum$$