(3\4 + 1\6) : 3 + ( 5\ 6 - 1\2) : 9 = 11/12 : 3/1 + (5/6 - 1/2) : 9/1 = 11/12 х 1/3 + 1/3 х 1/9 = 1/3 х ( 11/12 + 1/9) = 1/3 х 37/36 = 37/108 ( 3\4 - 5\12)*3 - 1\16 : 1\8 = 1/3 * 3 - 1\16 : 1\8 = 3/3 - 1\16 : 1\8 = 1 - 1/16 х 8/1 = 1- 8/16 = 1- 1/2 = 1/2