(8.74+0.66/13.2-3.79)*0.31=
1. 0,66:13,2=0,05
2.8,74+0,05=8,79
3.8,79-3,79=5
4.5*0,31=1,55
(8.74+0.66/13.2-3.79)*0.31=1,55