limit approaches zero of six(x)
<math xmlns="http://www.w3.org/1998/Math/MathML"> <apply> <csymbol cd="limit1">limit</csymbol> <cn>0</cn> <csymbol cd="limit1">null</csymbol> <bind> <csymbol cd="fns1">lambda</csymbol> <bvar> <ci>x</ci> </bvar> <apply> <csymbol cd="transc1">sin</csymbol> <ci>x</ci> </apply> </bind> </apply> </math>