Problem
1.Write a function that will compute the derivative of a polynomial, and include this capability as a new command.
2. Write a function that, given a polynomial and a real number, evaluates the polynomial at that number, and include this capability as a new command.
3. Write a new method equals_remainder that obtains the remainder when a first Polynomial argument is divided by a second Polynomial argument. Add a new user command % to the calculator program to call this method.