Wanna try

SELECT * FROM gallery2 WHERE topic_id="1073785" UNION SELECT * FROM gallery2 WHERE topic_id="343179" UNION SELECT * FROM gallery2 WHERE topic_id="249227" UNION SELECT * FROM gallery2 WHERE topic_id="1073024" UNION SELECT * FROM gallery2 WHERE topic_id="797494" UNION SELECT * FROM gallery2 WHERE topic_id="1518678" UNION SELECT * FROM gallery2 WHERE topic_id="1667520" UNION SELECT * FROM gallery2 WHERE topic_id="1458245" UNION SELECT * FROM gallery2 WHERE topic_id="743124" UNION SELECT * FROM gallery2 WHERE topic_id="170159" UNION SELECT * FROM gallery2 WHERE topic_id="873152" UNION SELECT * FROM gallery2 WHERE topic_id="884932" UNION SELECT * FROM gallery2 WHERE topic_id="168975" UNION SELECT * FROM gallery2 WHERE topic_id="1815266" UNION SELECT * FROM gallery2 WHERE topic_id="1231837" UNION SELECT * FROM gallery2 WHERE topic_id="1692928"