> I want to 
> download all compressed and exe files that are over 10kb 
> and under 100kb.
> *.zip*[>10]*.zip*[<100]*.exe*[>10]*.exe*[<100]*.rar*[>10]
> *.rar*[<100]

The correct syntax is: (actually you want all files > 10K 
and exclude files >100K)

+*.zip*[>10] -*.zip*[>100]
+*.exe*[>10] -*.exe*[>100]
+*.rar*[>10] -*.rar*[>100]