Problem implementing sets in scripting

[Anonymous]

Hi Geniuses,

I have a set

=Date(if(weekday(vRefreshDate)='Mon',max({<[Last Refresh Date] = {"<=$(=date(vRefreshDate-7,'MM/DD/YYYY'))"}>} [Last Refresh Date])),'MM/DD/YYYYY')

its working fine if I implement it in front end

now I want the same set to be implemented in the backend and the value of it will store in the variable which I can use it

Thanks in advance

Shashank