TopCount in CubeSet Function

I'm using some mdx functions in olap cube and now I have this function

=CUBESET("CUBE"
,"TopCount( -{[Sponsor Web].[1052]}
,10
,( [Measures].[Clients],[Sponsor].[Sponsor Name].&[1052],[Sponsor].[Region].[All].&[4]
            ))";"Label")

It works! Perfect! But I need change like this:

=CUBESET("CUBE"
,"TopCount( -{[Sponsor Web].[1052]}
,10
,( [Measures].[Clients],[Sponsor].[Sponsor Name].&[1052],[Sponsor].[Region].[All].&[4] and &[5] and &[6]
             ))";"Label")

Anyone can help me?