-5+9= 9-10= 7-9= 12+（- 9）= -2+9= 7-12= 5-91= 14-9= 9-14= 51-60= 60-100= 11-12= 13-13= 24-90= 0-17= 0-100= 100-101= 17-20= 1-7= 0-1= 1-0= 11-9= -9+6= -1+9= -9+8= -1+1= -3+11= -9+20= -7+7= 0+7= -1-1= 3-9= -3-9= -9-10= -9-6= -1-100= -1-99= -8+30= -5-5= -99-1= -1-99= -10+10= -25-25= 25-9= -1-1-1= -9-6-6= 5-4-9= 9+8-20= 20-9-1= 25-9-10= 10-9-7= 10+9+5= -9+9+5= -9-5+(-2)= 5-9-6= 6-9-1= 15-9-5= -2-2-2= -9+10+6= -3-9+20= -5+2+9= 19-20+1= 25-26+1= 21+5-30= 7-9-5= 9+5-30= 11-12+9= 25+25-51= 3+6-10=
