While exploring an abandoned mountain fortress, Emek and Tara found a network of locked passages controlled by panels displaying algebraic fractions. Each intersection offered several routes, but only the passage connected to the correctly simplified expression would open. They compared different factorization methods, identified common factors in the numerators and denominators, and simplified each expression while checking that no invalid cancellations were made. Their efficient work revealed the correct sequence of passages through the fortress. At the end of the maze, they recovered a valuable historical artifact that had remained hidden for centuries.