99. Write a polynomial arranged in descending powers of the number five, with coefficients being integers, non-negative, and less than 5. How can this polynomial be symbolically recorded in a manner similar to the notation of numbers in our decimal system? (See the previous question).
99. For example, the polynomial $3.5^{6}+1.5^{3}+2.5^{2}+4.5+1$ can be briefly written as 3001241 or, to avoid misunderstandings, as (3001241), where the 5 outside the parentheses indicates that the base of the numeral system is 5. Conversely, the symbol (432) represents the polynomial $4.5^{2}+3.5+2=117$ (in the decimal system). It can also be said that the number 117 in the decimal system is expressed in the base-5 system as 432.