220-50+60= (830-690)*3= 5000/100/2= 28+17*2= 60/15+96/4= 38+9*17= 39*3-27*2= 47+21*3-29= 900-105*3+42 = 123/3-41= 720+112*3-100= (63+27/9)*4=

220-50+60=170+60=230
(830-690)*3=140*3=420
5000:100*2=50*2=100
28+17*2=28+34=62

60:15+96:4=2+24=26
38+9*17=38+153=191
39*3-27*2=117-54=63
47+21*3-29=47+63-29=110-29=81

900-105*3+42=900-315+42=585+42=627
123:3-41=41-41=0
720+112*3-100=720+336-1001056-100=956
(63+27:9)*4=63+3=66*4=264