решите по действиям : (5\7*2целых1\3*5\6-1):(1-7\8*1целых3\5*3\14)= ? ПО ДЕЙСТВИЯМ!!!!!!

(5/7× 2 1/3 × 5/6 - 1 = 1 2/35/7 ×2 1/3 = 5/7 × 7/3= 5/35/3 × 5/6 =30/18=10/6=2 4/6 =2 2/32 2/3 - 1 = 1 2/3( 1 - 7/8 × 1 3/5 × 3/14) = 1/27/8 × 1 3/5= 7/8 × 8/3 =7/37/3 × 3/14 = 3/6=1/21 -1/2 = 1/2