100020 - (214652:206) = 100020 - 1042 = 99078
99078 - 521 = 98557
So, 100020 - (214652:206) - 521 = 98557.
100020 - (214652:206) = 100020 - 1042 = 99078
99078 - 521 = 98557
So, 100020 - (214652:206) - 521 = 98557.