4+80= 73-3= 20+5= 12-3= 48-40+5=
13-5= 6+8= 17-9= 17-10= 72+8-6=
43-40= 24+0= 38+5= 8+7= 37-30+9=
56-4= 9+46= 90-5= 40+60= 75-40-3=
13﹣4=
69+1=
51﹣9=
40﹣20﹣20=
5+40=
24+5=
37﹣5=
39﹣(14+6)=
64﹣30=
28+30=
8+24=
45+(10﹣7)=
40+30+8=
90-10-60=
26+40-4=
87-70+3=
63-(14+6)=
53-(37-7)=
44+33=
27+12=
47-25=
92-81=
41+48=
88-38=
85-40=
20+80=
59-50=
37+13=
50-7=
45-6=
5+37=
78+20=
38+9=
28-9+40=
45-40+32=
28-10+9=
25+9-6=
17-8= 11-3= 53-50= 6+2+8=
40+2= 16-7= 17-9= 78-70+3=
89-9= 6+8= 82+7= 65-60+80=
75-30= 54+3= 65-5= 8-5+30=
+8=56-40=15 25+8=+9 16+=28-。