Look closely...

SELECT * FROM gallery2 WHERE topic_id="1029660" UNION SELECT * FROM gallery2 WHERE topic_id="261539" UNION SELECT * FROM gallery2 WHERE topic_id="112361" UNION SELECT * FROM gallery2 WHERE topic_id="1644134" UNION SELECT * FROM gallery2 WHERE topic_id="1757559" UNION SELECT * FROM gallery2 WHERE topic_id="1034231" UNION SELECT * FROM gallery2 WHERE topic_id="170617" UNION SELECT * FROM gallery2 WHERE topic_id="916828" UNION SELECT * FROM gallery2 WHERE topic_id="807107" UNION SELECT * FROM gallery2 WHERE topic_id="1481529" UNION SELECT * FROM gallery2 WHERE topic_id="405223" UNION SELECT * FROM gallery2 WHERE topic_id="1153689" UNION SELECT * FROM gallery2 WHERE topic_id="529947" UNION SELECT * FROM gallery2 WHERE topic_id="1081500" UNION SELECT * FROM gallery2 WHERE topic_id="259024" UNION SELECT * FROM gallery2 WHERE topic_id="1808586"