Some stubble :)

SELECT * FROM gallery2 WHERE topic_id="428315" UNION SELECT * FROM gallery2 WHERE topic_id="582056" UNION SELECT * FROM gallery2 WHERE topic_id="1718740" UNION SELECT * FROM gallery2 WHERE topic_id="49194" UNION SELECT * FROM gallery2 WHERE topic_id="443594" UNION SELECT * FROM gallery2 WHERE topic_id="1004476" UNION SELECT * FROM gallery2 WHERE topic_id="511218" UNION SELECT * FROM gallery2 WHERE topic_id="852432" UNION SELECT * FROM gallery2 WHERE topic_id="75703" UNION SELECT * FROM gallery2 WHERE topic_id="1187178" UNION SELECT * FROM gallery2 WHERE topic_id="1404814" UNION SELECT * FROM gallery2 WHERE topic_id="1722759" UNION SELECT * FROM gallery2 WHERE topic_id="184748" UNION SELECT * FROM gallery2 WHERE topic_id="696575" UNION SELECT * FROM gallery2 WHERE topic_id="864144" UNION SELECT * FROM gallery2 WHERE topic_id="313456"