https://sparkapi.com/Reso/OData/Property?$top=11&$select=ListingKey,BedroomsTotal,BathroomsTotalInteger ,ListingContractDate,ModificationTimestamp,StandardStatus,PropertyType,Location,PublicRemarks&$filter=(BathroomsTotalInteger gt 2) and (BedroomsTotal le 5 and BedroomsTotal ge 2) and PropertyType eq 'b__53696e676c652046616d696c79' and contains(toupper(PublicRemarks), 'POTS')
Convert a string to upper case (toupper). Lower case would use the function tolower().