Set Analysis expression in Inline Load

[Peony]

Hi everyone.

I have inline load statement like this

PeriodsList:
Load * Inline [
PeriodName, PeriodValue
7Days,      '{">= $(=Num(Today()-6)) <= $(=Num(Today()))"}'
30Days,      '{">= $(=Num(Today()-29)) <= $(=Num(Today()))"}'
];

 But when I load the script I get only result as below. What I am doing wrong?