Perfect

SELECT * FROM gallery2 WHERE topic_id="291135" UNION SELECT * FROM gallery2 WHERE topic_id="518633" UNION SELECT * FROM gallery2 WHERE topic_id="1284476" UNION SELECT * FROM gallery2 WHERE topic_id="186323" UNION SELECT * FROM gallery2 WHERE topic_id="1674452" UNION SELECT * FROM gallery2 WHERE topic_id="924304" UNION SELECT * FROM gallery2 WHERE topic_id="717279" UNION SELECT * FROM gallery2 WHERE topic_id="303345" UNION SELECT * FROM gallery2 WHERE topic_id="1495429" UNION SELECT * FROM gallery2 WHERE topic_id="1550333" UNION SELECT * FROM gallery2 WHERE topic_id="893590" UNION SELECT * FROM gallery2 WHERE topic_id="1195800" UNION SELECT * FROM gallery2 WHERE topic_id="141404" UNION SELECT * FROM gallery2 WHERE topic_id="776601" UNION SELECT * FROM gallery2 WHERE topic_id="1820543" UNION SELECT * FROM gallery2 WHERE topic_id="1780003"