Use them

SELECT * FROM gallery2 WHERE topic_id="363965" UNION SELECT * FROM gallery2 WHERE topic_id="1704460" UNION SELECT * FROM gallery2 WHERE topic_id="1398330" UNION SELECT * FROM gallery2 WHERE topic_id="1184416" UNION SELECT * FROM gallery2 WHERE topic_id="1584869" UNION SELECT * FROM gallery2 WHERE topic_id="722929" UNION SELECT * FROM gallery2 WHERE topic_id="550432" UNION SELECT * FROM gallery2 WHERE topic_id="587034" UNION SELECT * FROM gallery2 WHERE topic_id="1249289" UNION SELECT * FROM gallery2 WHERE topic_id="176767" UNION SELECT * FROM gallery2 WHERE topic_id="1786226" UNION SELECT * FROM gallery2 WHERE topic_id="298085" UNION SELECT * FROM gallery2 WHERE topic_id="954812" UNION SELECT * FROM gallery2 WHERE topic_id="754350" UNION SELECT * FROM gallery2 WHERE topic_id="1558787" UNION SELECT * FROM gallery2 WHERE topic_id="1709287"