If you had to choose just one [4]

SELECT * FROM gallery2 WHERE topic_id="1176960" UNION SELECT * FROM gallery2 WHERE topic_id="669759" UNION SELECT * FROM gallery2 WHERE topic_id="1251491" UNION SELECT * FROM gallery2 WHERE topic_id="1208036" UNION SELECT * FROM gallery2 WHERE topic_id="1395555" UNION SELECT * FROM gallery2 WHERE topic_id="1161958" UNION SELECT * FROM gallery2 WHERE topic_id="296219" UNION SELECT * FROM gallery2 WHERE topic_id="139887" UNION SELECT * FROM gallery2 WHERE topic_id="660776" UNION SELECT * FROM gallery2 WHERE topic_id="834545" UNION SELECT * FROM gallery2 WHERE topic_id="693283" UNION SELECT * FROM gallery2 WHERE topic_id="319904" UNION SELECT * FROM gallery2 WHERE topic_id="754395" UNION SELECT * FROM gallery2 WHERE topic_id="758740" UNION SELECT * FROM gallery2 WHERE topic_id="113838" UNION SELECT * FROM gallery2 WHERE topic_id="487646"