Помогите с 4. Пожалуйста
Ответ: 0
8/16 - 21/16: (36/16+(12/16-42/16•1/7)) =8/16-21/16: (36/16+(12/16-6/16) =8/16-21/16: (36/16+6/16) =8/16-21/16: 42/16=8/16-1/2=8/16-8/16=0