14) 8/11 · (33/40 + 55/56) =

(8/11) · (33/40 + 55/56) = (8/11) · 33/40 + (8/11) · 55/56 = 3/5 + 5/7.

3/5 + 5/7 = 21/35 + 25/35 = 46/35.

Ответ: 46/35