arccosh(5 pi / 6)
<math xmlns="http://www.w3.org/1998/Math/MathML"> <apply> <csymbol cd="transc1">arccosh</csymbol> <apply> <csymbol cd="arith1">divide</csymbol> <apply> <csymbol cd="arith1">times</csymbol> <cn>5</cn> <csymbol cd="nums1">pi</csymbol> </apply> <cn>6</cn> </apply> </apply> </math>