Enjoy

SELECT * FROM gallery2 WHERE topic_id="1500664" UNION SELECT * FROM gallery2 WHERE topic_id="1557571" UNION SELECT * FROM gallery2 WHERE topic_id="1638313" UNION SELECT * FROM gallery2 WHERE topic_id="1541687" UNION SELECT * FROM gallery2 WHERE topic_id="44689" UNION SELECT * FROM gallery2 WHERE topic_id="1725253" UNION SELECT * FROM gallery2 WHERE topic_id="44560" UNION SELECT * FROM gallery2 WHERE topic_id="1118273" UNION SELECT * FROM gallery2 WHERE topic_id="1520738" UNION SELECT * FROM gallery2 WHERE topic_id="406504" UNION SELECT * FROM gallery2 WHERE topic_id="586073" UNION SELECT * FROM gallery2 WHERE topic_id="264655" UNION SELECT * FROM gallery2 WHERE topic_id="973270" UNION SELECT * FROM gallery2 WHERE topic_id="278464" UNION SELECT * FROM gallery2 WHERE topic_id="584412" UNION SELECT * FROM gallery2 WHERE topic_id="1275091"