vershinin01 (9.6*0,4-1.24)/1.3=(3.84-1.24)/1.3=2.6/1.3=2
(4.9+8.4/5.6)/1.6=(4.9+1.5)/1.6=6.4/1.6=4
(2.8*3.5-7.4)/0.8=(9.8-7.4)/0.8=2.4/0.8=3