I made a mess ;)

SELECT * FROM gallery2 WHERE topic_id="218459" UNION SELECT * FROM gallery2 WHERE topic_id="428467" UNION SELECT * FROM gallery2 WHERE topic_id="1245324" UNION SELECT * FROM gallery2 WHERE topic_id="1626739" UNION SELECT * FROM gallery2 WHERE topic_id="124357" UNION SELECT * FROM gallery2 WHERE topic_id="90418" UNION SELECT * FROM gallery2 WHERE topic_id="1798777" UNION SELECT * FROM gallery2 WHERE topic_id="1266928" UNION SELECT * FROM gallery2 WHERE topic_id="1398855" UNION SELECT * FROM gallery2 WHERE topic_id="709362" UNION SELECT * FROM gallery2 WHERE topic_id="499681" UNION SELECT * FROM gallery2 WHERE topic_id="899042" UNION SELECT * FROM gallery2 WHERE topic_id="194589" UNION SELECT * FROM gallery2 WHERE topic_id="303758" UNION SELECT * FROM gallery2 WHERE topic_id="733763" UNION SELECT * FROM gallery2 WHERE topic_id="957220"