142 + 42 = 184
21 + 4 = 25
100 + 99 = 199
100 + 07 = 107
90 + 89 = 179
99 + 99 = 198
10 + 90 = 100
18 + 24 = 42
99 + 91 = 190
5 + 30 = 35
12 + 123 = 135
61 + 61 = 122
10 + 11 = 21
63 + 3 = 66
100 + 57 = 157
29 + 92 = 121
13 + 30 = 43
184 + 04 = 188
98 + 89 = 187
120 + 12 = 132