oblicz
2/3-2/3*4
3/4-3/4*(-2)
3/8-5/8*0
4/7:8/14
(8-3) +3
(13-6) -7
(11+1) *5
(6+12) :3
6+12:3
22/5-7/5
13+11/6-2
40:10 + 1*4