More than all 3 combined

SELECT * FROM gallery2 WHERE topic_id="856691" UNION SELECT * FROM gallery2 WHERE topic_id="216781" UNION SELECT * FROM gallery2 WHERE topic_id="653543" UNION SELECT * FROM gallery2 WHERE topic_id="1073919" UNION SELECT * FROM gallery2 WHERE topic_id="798740" UNION SELECT * FROM gallery2 WHERE topic_id="1252137" UNION SELECT * FROM gallery2 WHERE topic_id="1791674" UNION SELECT * FROM gallery2 WHERE topic_id="479473" UNION SELECT * FROM gallery2 WHERE topic_id="1051349" UNION SELECT * FROM gallery2 WHERE topic_id="63938" UNION SELECT * FROM gallery2 WHERE topic_id="821179" UNION SELECT * FROM gallery2 WHERE topic_id="393628" UNION SELECT * FROM gallery2 WHERE topic_id="675531" UNION SELECT * FROM gallery2 WHERE topic_id="1691809" UNION SELECT * FROM gallery2 WHERE topic_id="1390137" UNION SELECT * FROM gallery2 WHERE topic_id="1740004"