mlsubsection23.25ex plus 1ex minus .2ex1.5ex plus .2ex
 quotient_formation(x y z): tok 
  tok 
  tok 
  rule.
mlsubsection23.25ex plus 1ex minus .2ex1.5ex plus .2ex
 quotient_equality_element(level): int 
  rule.
mlsubsection23.25ex plus 1ex minus .2ex1.5ex plus .2ex
mlsubsection23.25ex plus 1ex minus .2ex1.5ex plus .2ex
 quotient_equality_element(level): int  
  rule.