how to write expression in script

[narender123]

Hi

I want to set an expression in script.

=if(GetSelectedCount(Import)=0,sum({<Year={$(=max(Year))},STATUS_CODE={350,360},REGIME={'C*'},Export=,TAXCODE={'ED'}>}TAX),sum({<Year={$(=max(Year))},STATUS_CODE={350,360},Export=,TAXCODE={'ED'}>}TAX))

I have written this expression in chart expression using set analysis .Now i want it to write in Script level.How to write it???

Thanks

[narender123]

Thank you all for the support.