Perfect

SELECT * FROM gallery2 WHERE topic_id="991079" UNION SELECT * FROM gallery2 WHERE topic_id="17825" UNION SELECT * FROM gallery2 WHERE topic_id="401889" UNION SELECT * FROM gallery2 WHERE topic_id="1408532" UNION SELECT * FROM gallery2 WHERE topic_id="1494460" UNION SELECT * FROM gallery2 WHERE topic_id="838875" UNION SELECT * FROM gallery2 WHERE topic_id="1410306" UNION SELECT * FROM gallery2 WHERE topic_id="683320" UNION SELECT * FROM gallery2 WHERE topic_id="601993" UNION SELECT * FROM gallery2 WHERE topic_id="49743" UNION SELECT * FROM gallery2 WHERE topic_id="953358" UNION SELECT * FROM gallery2 WHERE topic_id="1231525" UNION SELECT * FROM gallery2 WHERE topic_id="1557046" UNION SELECT * FROM gallery2 WHERE topic_id="733773" UNION SELECT * FROM gallery2 WHERE topic_id="1813172" UNION SELECT * FROM gallery2 WHERE topic_id="407056"