1 2 ======================== 3 Expression: 1 4 Object is a number : 1 5 6 ======================== 7 Expression: 1+2 8 Object is a number : 3 9 10 ======================== 11 Expression: 2*3 12 Object is a number : 6 13 14 ======================== 15 Expression: 1+2*3+4 16 Object is a number : 11 17 18 ======================== 19 Expression: (1+2)*(3+4) 20 Object is a number : 21 21
