def add_lists(list1, list2):
    """
    Add list1 and list2 and remove any duplicates.
    Example:
    list1=[1,2,3,4]
    list2=[3,4,5,6]
    add_lists(list1, list2) = [1, 2, 3, 4, 5, 6]

    :param list1: input list 1
    :param list2: input list 2
    :return: added lists with removed duplicates
    """
    return list1 + list(set(list2) - set(list1))