4+5=
8+2=
9-5=
10-2=
6+3=
5+5=
9-3=
10-5=
10-9=
7-2=
8-0=
0+7=
5-5=
2=-0 -=1 =1+8
+5=9 -4=5 +=9
+3=4 8+=8