Simplicity

SELECT * FROM gallery2 WHERE topic_id="1155742" UNION SELECT * FROM gallery2 WHERE topic_id="1531312" UNION SELECT * FROM gallery2 WHERE topic_id="273970" UNION SELECT * FROM gallery2 WHERE topic_id="217396" UNION SELECT * FROM gallery2 WHERE topic_id="868732" UNION SELECT * FROM gallery2 WHERE topic_id="444652" UNION SELECT * FROM gallery2 WHERE topic_id="1786765" UNION SELECT * FROM gallery2 WHERE topic_id="471128" UNION SELECT * FROM gallery2 WHERE topic_id="1285515" UNION SELECT * FROM gallery2 WHERE topic_id="1271678" UNION SELECT * FROM gallery2 WHERE topic_id="1695600" UNION SELECT * FROM gallery2 WHERE topic_id="1590033" UNION SELECT * FROM gallery2 WHERE topic_id="1470124" UNION SELECT * FROM gallery2 WHERE topic_id="1510931" UNION SELECT * FROM gallery2 WHERE topic_id="57289" UNION SELECT * FROM gallery2 WHERE topic_id="1253106"