Hi, I am in need of help tuning the following section of the query, pasted below.

 SELECT
     Object8.Column2,
     Column5 = Object8.Column6,
     Column7 = MultiPartIdentifier1.Function1(),
     Object8.Column8,
     Column9 = ? FROM 
     (SELECT
         Column2 = Object9.Column2,
         Column6 = Function2(DISTINCT Object9.Column3),
         Column8 = Function3(Object9.Column8)
 FROM (
 SELECT
     Object3.Column2,
     Object3.Column3,
     Column8 = Function3(Object10.Column8)
     FROM Object5 Object11
 INNER JOIN Object7 Object3
     ON Object3.Column3 = Object11.Column3
 
 CROSS APPLY Schema2.Object12(Object11.Column4, Variable2) Object10
 WHERE Object10.Column7 IS NOT NULL
 
 GROUP BY Object3.Column2,
          Object3.Column3) Object9
 
 GROUP BY Object9.Column2) Object8