∂ ⁡ x <annotation-xml encoding="MathML-Content" id="p1.1.m1.1b"> <apply id="p1.1.m1.1.1.1.cmml" xref="p1.1.m1.1.1.2"> <partialdiff id="p1.1.m1.1.1.1.1.cmml" xref="p1.1.m1.1.1.2.1"/> <ci id="p1.1.m1.1.1.2.2.cmml" xref="p1.1.m1.1.1.2.2">𝑥</ci> </apply> </annotation-xml> {\displaystyle{\displaystyle\partial\NVar{x}}}
z <annotation-xml encoding="MathML-Content" id="p1.1.m1.1b"> <ci id="p1.1.m1.1.1.cmml" xref="p1.1.m1.1.1">𝑧</ci> </annotation-xml> {\displaystyle{\displaystyle z}}
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}}
x <annotation-xml encoding="MathML-Content" id="p1.1.m1.1b"> <ci id="p1.1.m1.1.1.cmml" xref="p1.1.m1.1.1">𝑥</ci> </annotation-xml> {\displaystyle{\displaystyle x}}