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