https://api.bridgedataoutput.com/api/v2/OData/har/Properties?$filter=not(BedroomsTotal le 3) and (PropertyType eq 'Residential')&$select=ListingKey,BedroomsTotal,StreetName,StreetNumber,City,PropertyType,ModificationTimestamp,ListAgent,CloseDate,BedroomsTotal&$top=10
A boolean ‘Not’ must enclose its operands in a parenthesis with not as an operator i.e. not(City eq ‘Elkwood’).