Perfect

SELECT * FROM gallery2 WHERE topic_id="1466515" UNION SELECT * FROM gallery2 WHERE topic_id="220665" UNION SELECT * FROM gallery2 WHERE topic_id="347483" UNION SELECT * FROM gallery2 WHERE topic_id="1427344" UNION SELECT * FROM gallery2 WHERE topic_id="671895" UNION SELECT * FROM gallery2 WHERE topic_id="1075517" UNION SELECT * FROM gallery2 WHERE topic_id="1468337" UNION SELECT * FROM gallery2 WHERE topic_id="523162" UNION SELECT * FROM gallery2 WHERE topic_id="732407" UNION SELECT * FROM gallery2 WHERE topic_id="798565" UNION SELECT * FROM gallery2 WHERE topic_id="1487864" UNION SELECT * FROM gallery2 WHERE topic_id="1428843" UNION SELECT * FROM gallery2 WHERE topic_id="1622324" UNION SELECT * FROM gallery2 WHERE topic_id="375652" UNION SELECT * FROM gallery2 WHERE topic_id="105179" UNION SELECT * FROM gallery2 WHERE topic_id="1206492"