(72:6+128): 2x9=? 900- (320:8+480:6)=? 700+(330-420:7-136)=? 600+(399:1-144x0)=? 300:100+(255-160:160)=? (235+325): 7x4-127=?

(72:6+128): 2*9=(12+128): 2*9=140:2*9=70*9=630900 — (320:8+480:6)=900 — (40+80)=900 — 120=780700+(330-420:7-136)=700+(330-60-136)=700+(270-136)=700+134=834600+(399:1-144*0)=600+(399-0)=600+399=999300:100+(255-160:160)=300:100+(255-1)=300:100+256=3+256=259 (235+325): 7*4-127=560:7*4-127=80*4-127=320-127=193