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)
