1 1/22*3 2/3-(2 5\6+3 5/6*7/23)*3/5=

1 1/22 * 3 2/3 - (2 5/6 + 3 5/6 * 7/23) * 3/5 = 3 2/15 1) 3 5/6 * 7/23 = 23/6 * 7/23 = 7/6 2) 7/6 * 3/5 = (7*1)/(2*5) = 7/10  3) 1 1/22 * 3 2/3 = 23/22 * 11/3 = (23*1)/(2*3) = 23/6 = 3 5/6 4) 3 5/6 - 7/10 = 3 25/30 - 21/30 = 3 4/30 = 3 2/15