1)48-29+37-19
2.156+228-193-66
3.39*45:65*2
4.1024:128*15:10
5.245:7-224:16+35*11
6.322:23*70-161*9:69
7.315:(162+12*24-11*39)+558:31
8.(24*7-377:29)*(2378:58-38)
9.(120+16*7)*240:(300-5*44)
10.(372+118*6):(38*35-34*37)-12
11.3124:(3*504-4*307)+10403 :104
12.15+(12322:(24+37)-12*15):(35*2-59)