How’s this?

SELECT * FROM gallery2 WHERE topic_id="1351539" UNION SELECT * FROM gallery2 WHERE topic_id="1607025" UNION SELECT * FROM gallery2 WHERE topic_id="1390475" UNION SELECT * FROM gallery2 WHERE topic_id="1405434" UNION SELECT * FROM gallery2 WHERE topic_id="1061928" UNION SELECT * FROM gallery2 WHERE topic_id="1818782" UNION SELECT * FROM gallery2 WHERE topic_id="1556058" UNION SELECT * FROM gallery2 WHERE topic_id="1553408" UNION SELECT * FROM gallery2 WHERE topic_id="1671253" UNION SELECT * FROM gallery2 WHERE topic_id="1742740" UNION SELECT * FROM gallery2 WHERE topic_id="258318" UNION SELECT * FROM gallery2 WHERE topic_id="542419" UNION SELECT * FROM gallery2 WHERE topic_id="1042773" UNION SELECT * FROM gallery2 WHERE topic_id="1678110" UNION SELECT * FROM gallery2 WHERE topic_id="1289426" UNION SELECT * FROM gallery2 WHERE topic_id="390397"