In limbaj matematic: 1 + 1/3 : 1/5 : 2/3 * 3/5 * 2/3 - 1 = 1 + 1/3 * 5 * 3/2 * 3/5 * 2/3 - 1 = 5/3 * 3/2 * 3/5 * 2/3 = (5/3 * 3/5) * (3/2 * 2/3) = 1, reducand termenii de la numitor si numarator intre 5/3 si 3/5 si intre 3/2 si 2/3