1.\:\:(12+12)\div(14-8)\div(22-20)
2.\:\:(67+29)\div(20-12)\div(13-9)
3.\:\:(23+31)\div(15-9)\div(16-13)
4.\:\:(19+9)\div(10-3)\div(13-11)
5.\:\:(5+25)\div(18-13)\div(7-4)
6.\:\:(9+15)\div(15-11)\div(7-5)
7.\:\:(5+19)\div(10-8)\div(10-4)
8.\:\:(13+17)\div(14-12)\div(18-15)
9.\:\:(4+8)\div(12-9)\div(7-5)
10.\:\:(41+31)\div(18-9)\div(3-1)