just stretching don’t mind me ;)

SELECT * FROM gallery2 WHERE topic_id="1342063" UNION SELECT * FROM gallery2 WHERE topic_id="620492" UNION SELECT * FROM gallery2 WHERE topic_id="402810" UNION SELECT * FROM gallery2 WHERE topic_id="1796664" UNION SELECT * FROM gallery2 WHERE topic_id="346728" UNION SELECT * FROM gallery2 WHERE topic_id="542575" UNION SELECT * FROM gallery2 WHERE topic_id="1715627" UNION SELECT * FROM gallery2 WHERE topic_id="558512" UNION SELECT * FROM gallery2 WHERE topic_id="995360" UNION SELECT * FROM gallery2 WHERE topic_id="622835" UNION SELECT * FROM gallery2 WHERE topic_id="244960" UNION SELECT * FROM gallery2 WHERE topic_id="645959" UNION SELECT * FROM gallery2 WHERE topic_id="1434189" UNION SELECT * FROM gallery2 WHERE topic_id="308068" UNION SELECT * FROM gallery2 WHERE topic_id="291003" UNION SELECT * FROM gallery2 WHERE topic_id="794069"