в) 139*37-108*37+69*37;

139*37=5143
108*37=3996
69*37=2553
5143-3996=1147
1147+2553=3700

139*37-108*37+69*37=3700
1.139*37= 5143
2.108*37=3996
3.69*37=2553
4.5143-3996=1147
5.1147+2553=3700