8,2:2/8
4,56:7/49
2,74:1/70
(93-27) — 1
(38-19) — 2
(94-38) —3
(93-27)-(38-19) — 4
(93-27)-(38-19)-28 — 5
(93-27)-(38-19)-28+(94-38) — 6
1)350+70=420 2) 720-60=660 3)720-60=660
34*6=204
204-84=120
120:5=5
47*11=517
517-386=131
131*2=262
5+262=267
(34*6-84):5+(47*11-386)*2=267