Before launching an exploration probe, Emek and Tara entered the mission control center to review the onboard diagnostic program. The computer had created several formulas to describe the probe's navigation settings, but some expressions were too complex for the system to interpret. They simplified the algebraic expressions by combining like terms and comparing the results with the required configuration values. After checking each calculation, they discovered that one incorrect setting could have changed the probe's route. With the corrected expressions entered into the computer, the navigation system was calibrated properly, and the probe launched toward its destination without error.