Outline :)

SELECT * FROM gallery2 WHERE topic_id="882990" UNION SELECT * FROM gallery2 WHERE topic_id="1339742" UNION SELECT * FROM gallery2 WHERE topic_id="661884" UNION SELECT * FROM gallery2 WHERE topic_id="527169" UNION SELECT * FROM gallery2 WHERE topic_id="509987" UNION SELECT * FROM gallery2 WHERE topic_id="872533" UNION SELECT * FROM gallery2 WHERE topic_id="1356705" UNION SELECT * FROM gallery2 WHERE topic_id="601527" UNION SELECT * FROM gallery2 WHERE topic_id="1427812" UNION SELECT * FROM gallery2 WHERE topic_id="218357" UNION SELECT * FROM gallery2 WHERE topic_id="506155" UNION SELECT * FROM gallery2 WHERE topic_id="1457719" UNION SELECT * FROM gallery2 WHERE topic_id="60697" UNION SELECT * FROM gallery2 WHERE topic_id="1130658" UNION SELECT * FROM gallery2 WHERE topic_id="547029" UNION SELECT * FROM gallery2 WHERE topic_id="276325"