?? ??????? ??? ???????? ?????? ???? ???? ????????? ???????? ???? ????, ???? ???? ???? ????(????)????, ??????????? ????? ????(???? ???? ???? ???????? ???? ?????? ????????????????? ???? ??????(??)???? ??????????? ?? ???????????? ??????? ????= ?? ????+ ????? (???????? ???? ??????)?? ??? ?????? ?????? ???? ???? ??, ?? ???? ?? ?? ???????????????? ???? ?