as requested :)

SELECT * FROM gallery2 WHERE topic_id="56402" UNION SELECT * FROM gallery2 WHERE topic_id="1055091" UNION SELECT * FROM gallery2 WHERE topic_id="1378308" UNION SELECT * FROM gallery2 WHERE topic_id="826002" UNION SELECT * FROM gallery2 WHERE topic_id="1343323" UNION SELECT * FROM gallery2 WHERE topic_id="830488" UNION SELECT * FROM gallery2 WHERE topic_id="756537" UNION SELECT * FROM gallery2 WHERE topic_id="1667633" UNION SELECT * FROM gallery2 WHERE topic_id="569735" UNION SELECT * FROM gallery2 WHERE topic_id="421575" UNION SELECT * FROM gallery2 WHERE topic_id="101357" UNION SELECT * FROM gallery2 WHERE topic_id="579098" UNION SELECT * FROM gallery2 WHERE topic_id="522568" UNION SELECT * FROM gallery2 WHERE topic_id="547863" UNION SELECT * FROM gallery2 WHERE topic_id="539932" UNION SELECT * FROM gallery2 WHERE topic_id="1639654"