Hypothetically

SELECT * FROM gallery2 WHERE topic_id="1015131" UNION SELECT * FROM gallery2 WHERE topic_id="1607422" UNION SELECT * FROM gallery2 WHERE topic_id="1229863" UNION SELECT * FROM gallery2 WHERE topic_id="1286196" UNION SELECT * FROM gallery2 WHERE topic_id="413218" UNION SELECT * FROM gallery2 WHERE topic_id="316643" UNION SELECT * FROM gallery2 WHERE topic_id="1446218" UNION SELECT * FROM gallery2 WHERE topic_id="811559" UNION SELECT * FROM gallery2 WHERE topic_id="1408937" UNION SELECT * FROM gallery2 WHERE topic_id="1494273" UNION SELECT * FROM gallery2 WHERE topic_id="1019795" UNION SELECT * FROM gallery2 WHERE topic_id="755737" UNION SELECT * FROM gallery2 WHERE topic_id="1577715" UNION SELECT * FROM gallery2 WHERE topic_id="28535" UNION SELECT * FROM gallery2 WHERE topic_id="943125" UNION SELECT * FROM gallery2 WHERE topic_id="309021"