(1)4492 - 3409 = (2)4814 + 4678 = (3)4174 - 1986 =
(4)1242 - 1014 = (5)7648 + 1606 = (6)8314 + 1415 =
(7)2523 + 5841 = (8)3536 - 2768 = (9)5984 + 1393 =
(10)9379 - 3724 = (11)1297 + 6439 = (12)8125 - 2304 =
(13)2396 - 1738 = (14)5590 + 2856 = (15)5126 + 2455 =