5000 - 500: 5 *3 - 14 *5
1. 500 :5= 100
2. 100*3=300
3. 14*5=70
4. 5000-300 = 4700
5. 4700-70=4630
( 270:9*4+880)*927+3
1. 270:9= 30
2. 30*4=120
3. 120+880=1000
4. 1000*927=927000
5. 927000+3=927003
648720:68+506*108-63295
1.648720:68=9540
2. 506*108=54648
3. 9540+54648=64188
4. 64188-63295=893