7500+72-250x2=7572-500=7072
160:80x100+12000-2000=2x100+12000-2000=12200-2000=10200
(108-108:4):3x10000=270000
15+360.000:100-3000=3615-3000=615
(90007-7):100-852:6=90000:100=900-142=758
142830-400x2-15x2=400x2=800=15x2=30=800+30=142830-830=142000
150:3+200x4+1000+2=50+800+1000+2=1852
130:3+102000:1000-184=390+102-184=308