num1,operation,num2,Output,flag
1,add,1,2,other
10,multiply,124,1240,other
2,add,2,4,off by one
,add,,,other
,add,,,off by one
,add,,,wrong sign
,add,,,wrong sign
1,multiply,2,2,off by one
1,multiply,2,2,off by one
,add,,,wrong sign
6,divide,8,0.75,off by one
88,multiply,88,7744,other
,add,,,wrong sign
,add,,,wrong sign
,add,,,off by one
1,add,1,2,other
1,add,1,2,other
1,add,1,2,other