code: public static double exponent(Object left, Object right) throws PageException {
  	return StrictMath.pow(Caster.toDoubleValue(left), Caster.toDoubleValue(right));
      }
docs: calculate the exponent of the left value
  
  @param left value to get exponent from
  @param right exponent count
  @return return expoinended value
  @throws PageException