expanding TeXtoIDL

          'leq':     = '!9' + String("154B) + '!X'
          'geq':    = '!9' + String("142B) + '!X'
          'neq':    = '!9' + String("75B) + '!X' 
          'deg':    = '!9' + String("45B) + '!X'
          '+-':       = '!9' + String("53B) + '!X'
          'equiv':    = '!9' + String("72B) + '!X'
          'prime':    = '!9' + String("140B) + '!X'
          'angstrom': = '!3' + String("305B) + '!X'
          'sun':      = '!D!9n!N!X'
          'varphi':   = '!9' + String("120B) + '!X'
          'infinity': = '!9' + String("44B) + '!X'
          'copyright': = '!3' + String("251B) + '!X'
          'up':       = '!U'
          'down':     = '!D'
          'exp':      = '!E'
          'sub':      = '!I'
          'n':        = '!N'
          'div':      = '!9' + String("57B) + '!X'
          'times':    = '!9' + String("130B) + '!X'