code: function(rs, args) {
  			// This function is invoked by messages such as:
  			//   what is 5 subtracted by 2
  			//   add 6 to 7
  			if (args[0].match(/^\d+$/)) {
  				// They used the first form, with a number.
  				return Controllers.doMath(args[1], args[0], args[2]);
  			}
  			else {
  				// The second form, first word being the operation.
  				return Controllers.doMath(args[0], args[1], args[2]);
  			}
  		}
docs: The object macro function itself.