Salesforce formula field multi select picklist

IF(INCLUDES(Multi_Picklist_1__c , "Bangalore") , "Bangalore;",NULL) +
IF(INCLUDES(Multi_Picklist_1__c , "Chennai"),"Chennai;",NULL) +
IF(INCLUDES(Multi_Picklist_1__c , "Delhi"),"Delhi;",NULL) +
IF(INCLUDES(Multi_Picklist_1__c , "Pune"),"Pune;",NULL) +
IF(INCLUDES(Multi_Picklist_1__c , "Kolkata"),"Kolkata;",NULL) +
IF(INCLUDES(Multi_Picklist_1__c , "Hydrebad"),"Hydrebad;",NULL)