Помогите (3/8-2/3):48-(5-7 4/7):1 13/14

1)3/8-2/3=(9-16)/24=-7/242)-7/24:48=-7/24*1/48=- 7/11523)5-7 4/7=5-53/7=-2 4/74)-2 4/7 : 1 13/14= -18/7 :27/14=-4/3=-1 1/35) -7/ 1152+ 1 1/3= -7/1152+1536/1152=1529/1152~(примерно 1,3)