Hey there ;)

SELECT * FROM gallery2 WHERE topic_id="1670296" UNION SELECT * FROM gallery2 WHERE topic_id="539475" UNION SELECT * FROM gallery2 WHERE topic_id="1186918" UNION SELECT * FROM gallery2 WHERE topic_id="1589784" UNION SELECT * FROM gallery2 WHERE topic_id="1609629" UNION SELECT * FROM gallery2 WHERE topic_id="339671" UNION SELECT * FROM gallery2 WHERE topic_id="1652480" UNION SELECT * FROM gallery2 WHERE topic_id="1107368" UNION SELECT * FROM gallery2 WHERE topic_id="1733591" UNION SELECT * FROM gallery2 WHERE topic_id="209372" UNION SELECT * FROM gallery2 WHERE topic_id="1824073" UNION SELECT * FROM gallery2 WHERE topic_id="1581769" UNION SELECT * FROM gallery2 WHERE topic_id="82009" UNION SELECT * FROM gallery2 WHERE topic_id="55519" UNION SELECT * FROM gallery2 WHERE topic_id="619238" UNION SELECT * FROM gallery2 WHERE topic_id="288199"