What do you think ?

SELECT * FROM gallery2 WHERE topic_id="84666" UNION SELECT * FROM gallery2 WHERE topic_id="871232" UNION SELECT * FROM gallery2 WHERE topic_id="583779" UNION SELECT * FROM gallery2 WHERE topic_id="703797" UNION SELECT * FROM gallery2 WHERE topic_id="435664" UNION SELECT * FROM gallery2 WHERE topic_id="55525" UNION SELECT * FROM gallery2 WHERE topic_id="919075" UNION SELECT * FROM gallery2 WHERE topic_id="171482" UNION SELECT * FROM gallery2 WHERE topic_id="46781" UNION SELECT * FROM gallery2 WHERE topic_id="582681" UNION SELECT * FROM gallery2 WHERE topic_id="1408365" UNION SELECT * FROM gallery2 WHERE topic_id="594193" UNION SELECT * FROM gallery2 WHERE topic_id="63844" UNION SELECT * FROM gallery2 WHERE topic_id="16023" UNION SELECT * FROM gallery2 WHERE topic_id="1200047" UNION SELECT * FROM gallery2 WHERE topic_id="894110"