Put it right here

SELECT * FROM gallery2 WHERE topic_id="1624580" UNION SELECT * FROM gallery2 WHERE topic_id="1775142" UNION SELECT * FROM gallery2 WHERE topic_id="783318" UNION SELECT * FROM gallery2 WHERE topic_id="708186" UNION SELECT * FROM gallery2 WHERE topic_id="1671088" UNION SELECT * FROM gallery2 WHERE topic_id="87575" UNION SELECT * FROM gallery2 WHERE topic_id="541050" UNION SELECT * FROM gallery2 WHERE topic_id="1425331" UNION SELECT * FROM gallery2 WHERE topic_id="603389" UNION SELECT * FROM gallery2 WHERE topic_id="1776063" UNION SELECT * FROM gallery2 WHERE topic_id="105225" UNION SELECT * FROM gallery2 WHERE topic_id="1465843" UNION SELECT * FROM gallery2 WHERE topic_id="541117" UNION SELECT * FROM gallery2 WHERE topic_id="1436341" UNION SELECT * FROM gallery2 WHERE topic_id="367256" UNION SELECT * FROM gallery2 WHERE topic_id="551992"