(2510 * 4 + 4 - b) : 4 + 65 = 2200
(10040 + 4 - b) : 4 = 2200 - 65
(10044 - b) : 4 = 2135
10044 - b = 2135 * 4
10044 - b = 8540
b = 10044 - 8540
b = 1504