A little bit of adjustment

SELECT * FROM gallery2 WHERE topic_id="1463401" UNION SELECT * FROM gallery2 WHERE topic_id="1351212" UNION SELECT * FROM gallery2 WHERE topic_id="64887" UNION SELECT * FROM gallery2 WHERE topic_id="1471891" UNION SELECT * FROM gallery2 WHERE topic_id="1278718" UNION SELECT * FROM gallery2 WHERE topic_id="1352368" UNION SELECT * FROM gallery2 WHERE topic_id="501819" UNION SELECT * FROM gallery2 WHERE topic_id="1688291" UNION SELECT * FROM gallery2 WHERE topic_id="111938" UNION SELECT * FROM gallery2 WHERE topic_id="1592867" UNION SELECT * FROM gallery2 WHERE topic_id="1212595" UNION SELECT * FROM gallery2 WHERE topic_id="1262653" UNION SELECT * FROM gallery2 WHERE topic_id="1045855" UNION SELECT * FROM gallery2 WHERE topic_id="419396" UNION SELECT * FROM gallery2 WHERE topic_id="1375959" UNION SELECT * FROM gallery2 WHERE topic_id="419589"