(5/₇ * 2 1/₃ * 5/₆ - 1)÷ ( 1 - 7/₈ * 1 3/₅ * 3/₁₄ )

Пошаговое объяснение:

(5/7 * 7/3 * 5/6 -1) : ( 1-7/8 * 8/5 * 3/14)= (5/3 * 5/6 -1) : (1 - 7/5 *3/14)=

=(10/18-1) : (1-3/10)= -8/10*10/7= -8/7= -1 1/7