At the end of 12th grade, Clare’s aunt started investing money for her to use after graduating from college four years later. The first deposit was $500. If r is the annual interest rate of the account, then at the end of each school year the balance in the account is multiplied by a growth factor of x=1+r. After one year, the total v-alue is 300x. After two years, the total value is 300x⋅x=300x^2. Write an expression for the total value after graduation in terms of x. If Clare’s aunt had invested another $800 at the end of her freshman year, what would the expression be for the total value after graduation in terms of x?