public int put(MathData md)
 {
     return(md.Num1 + md.Num2);
 }
 public int delete(MathData md)
 {
     return(md.Num1 + md.Num2);
 }
 public int Get([FromUri] MathData md)
 {
     return(md.Num1 + md.Num2);
 }