How does it look?

SELECT * FROM gallery2 WHERE topic_id="1721824" UNION SELECT * FROM gallery2 WHERE topic_id="1688822" UNION SELECT * FROM gallery2 WHERE topic_id="1139594" UNION SELECT * FROM gallery2 WHERE topic_id="257463" UNION SELECT * FROM gallery2 WHERE topic_id="915759" UNION SELECT * FROM gallery2 WHERE topic_id="243436" UNION SELECT * FROM gallery2 WHERE topic_id="617651" UNION SELECT * FROM gallery2 WHERE topic_id="859408" UNION SELECT * FROM gallery2 WHERE topic_id="666235" UNION SELECT * FROM gallery2 WHERE topic_id="1251733" UNION SELECT * FROM gallery2 WHERE topic_id="604768" UNION SELECT * FROM gallery2 WHERE topic_id="687635" UNION SELECT * FROM gallery2 WHERE topic_id="1367170" UNION SELECT * FROM gallery2 WHERE topic_id="735256" UNION SELECT * FROM gallery2 WHERE topic_id="1143854" UNION SELECT * FROM gallery2 WHERE topic_id="297958"