2nd try

SELECT * FROM gallery2 WHERE topic_id="1745926" UNION SELECT * FROM gallery2 WHERE topic_id="19560" UNION SELECT * FROM gallery2 WHERE topic_id="343735" UNION SELECT * FROM gallery2 WHERE topic_id="461942" UNION SELECT * FROM gallery2 WHERE topic_id="675853" UNION SELECT * FROM gallery2 WHERE topic_id="816319" UNION SELECT * FROM gallery2 WHERE topic_id="610321" UNION SELECT * FROM gallery2 WHERE topic_id="1323897" UNION SELECT * FROM gallery2 WHERE topic_id="1628528" UNION SELECT * FROM gallery2 WHERE topic_id="1329902" UNION SELECT * FROM gallery2 WHERE topic_id="1073166" UNION SELECT * FROM gallery2 WHERE topic_id="1647979" UNION SELECT * FROM gallery2 WHERE topic_id="1216224" UNION SELECT * FROM gallery2 WHERE topic_id="551775" UNION SELECT * FROM gallery2 WHERE topic_id="1706114" UNION SELECT * FROM gallery2 WHERE topic_id="1803255"