First post here!

SELECT * FROM gallery2 WHERE topic_id="1516820" UNION SELECT * FROM gallery2 WHERE topic_id="1457150" UNION SELECT * FROM gallery2 WHERE topic_id="1478445" UNION SELECT * FROM gallery2 WHERE topic_id="1797162" UNION SELECT * FROM gallery2 WHERE topic_id="1517128" UNION SELECT * FROM gallery2 WHERE topic_id="1227218" UNION SELECT * FROM gallery2 WHERE topic_id="1436871" UNION SELECT * FROM gallery2 WHERE topic_id="1027363" UNION SELECT * FROM gallery2 WHERE topic_id="125761" UNION SELECT * FROM gallery2 WHERE topic_id="1467419" UNION SELECT * FROM gallery2 WHERE topic_id="1580854" UNION SELECT * FROM gallery2 WHERE topic_id="1547204" UNION SELECT * FROM gallery2 WHERE topic_id="663281" UNION SELECT * FROM gallery2 WHERE topic_id="307229" UNION SELECT * FROM gallery2 WHERE topic_id="1113918" UNION SELECT * FROM gallery2 WHERE topic_id="649935"