Вычислить (2/15-3 3/35): (14/15+2/45

= (14/105 - 3 9/105) : (42/45 + 2/45) = (- 2 100/105) : 44/45 = (- 2 20/21) : 44/45 = (- 62/21) : 44/45 = (- 62/21) * 45/44 =  - 3 3/154

(2/15-3 3/35):(14/15+2/45)=3 3/154
1) 2/15-3 3/35=14/105-3 9/105=14/105-2 114/105=-2 100/105=2 20/21
2) 14/15+2/45=42/45+2/45=44/45
3) 2 20/21:44/45=62/21:44/45=465/154=3 3/154