Math Notes

1212 + 1388 + 2349 = 4949; 49493 = 121213882349
1287 + 1113 + 2649 = 5049; 50493 = 128711132649
1623 + 2457 + 1375 = 5455; 54553 = 162324571375
1713 + 2377 + 1464 = 5554; 55543 = 171323771464
3689 + 1035 + 2448 = 7172; 71723 = 368910352448