! <annotation-xml encoding="MathML-Content" id="p1.1.m1.1b"> <factorial id="p1.1.m1.1.1.cmml" xref="p1.1.m1.1.1"/> </annotation-xml> {\displaystyle{\displaystyle!}}
k <annotation-xml encoding="MathML-Content" id="p1.1.m1.1b"> <ci id="p1.1.m1.1.1.cmml" xref="p1.1.m1.1.1">𝑘</ci> </annotation-xml> {\displaystyle{\displaystyle k}}
m <annotation-xml encoding="MathML-Content" id="p1.1.m1.1b"> <ci id="p1.1.m1.1.1.cmml" xref="p1.1.m1.1.1">𝑚</ci> </annotation-xml> {\displaystyle{\displaystyle m}}
n <annotation-xml encoding="MathML-Content" id="p1.1.m1.1b"> <ci id="p1.1.m1.1.1.cmml" xref="p1.1.m1.1.1">𝑛</ci> </annotation-xml> {\displaystyle{\displaystyle n}}