standard functions


  {input:"lim",  tag:"mo", output:"lim", tex:null, ttype:UNDEROVER},
  {input:"Lim",  tag:"mo", output:"Lim", tex:null, ttype:UNDEROVER},
  {input:"sin",  tag:"mo", output:"sin", tex:null, ttype:UNARY, func:true},
  {input:"cos",  tag:"mo", output:"cos", tex:null, ttype:UNARY, func:true},
  {input:"tan",  tag:"mo", output:"tan", tex:null, ttype:UNARY, func:true},
  {input:"sinh", tag:"mo", output:"sinh", tex:null, ttype:UNARY, func:true},
  {input:"cosh", tag:"mo", output:"cosh", tex:null, ttype:UNARY, func:true},
  {input:"tanh", tag:"mo", output:"tanh", tex:null, ttype:UNARY, func:true},
  {input:"cot",  tag:"mo", output:"cot", tex:null, ttype:UNARY, func:true},
  {input:"sec",  tag:"mo", output:"sec", tex:null, ttype:UNARY, func:true},
  {input:"csc",  tag:"mo", output:"csc", tex:null, ttype:UNARY, func:true},
  {input:"log",  tag:"mo", output:"log", tex:null, ttype:UNARY, func:true},
  {input:"ln",   tag:"mo", output:"ln",  tex:null, ttype:UNARY, func:true},
  {input:"det",  tag:"mo", output:"det", tex:null, ttype:UNARY, func:true},
  {input:"dim",  tag:"mo", output:"dim", tex:null, ttype:CONST},
  {input:"mod",  tag:"mo", output:"mod", tex:null, ttype:CONST},
  {input:"gcd",  tag:"mo", output:"gcd", tex:null, ttype:UNARY, func:true},
  {input:"lcm",  tag:"mo", output:"lcm", tex:null, ttype:UNARY, func:true},
  {input:"lub",  tag:"mo", output:"lub", tex:null, ttype:CONST},
  {input:"glb",  tag:"mo", output:"glb", tex:null, ttype:CONST},
  {input:"min",  tag:"mo", output:"min", tex:null, ttype:UNDEROVER},
  {input:"max",  tag:"mo", output:"max", tex:null, ttype:UNDEROVER},