To solve the fast calculation problem involving the sum of three questions, three summation formulas are provided: the sum of the first n natural numbers, the sum of the squares of the first n natural numbers, and the sum of the cubes of the first n natural numbers. Each formula requires identifying the value of n to compute the respective sums. Users are encouraged to apply these formulas to their specific problems for accurate results. The discussion emphasizes the importance of correctly determining n for effective calculations.