def parse_file_line_numbers(formatted_numbers):
    """
    Parse "start,count" formatted line numbers
    """
    formatted = formatted_numbers[1:]  # strip -/+
    formatted_parts = formatted.split(',')
    start = int(formatted_parts[0])
    count = int(formatted_parts[1]) if len(formatted_parts) > 1 else 1
    return start, count