Răspuns :
{100-[99+999-(1000-1)]:9}:89=
=[100-(99+999-999):9]:89=
=(100-99:9):89=
=(100-11):89=
=89:89=
=1
=[100-(99+999-999):9]:89=
=(100-99:9):89=
=(100-11):89=
=89:89=
=1
{100-[99+999-(1000-1)]:9}:89=1
[100-(99+999-999):9]:89=
(100-99:9):89=
(100-11):89=
89:89=
1
[100-(99+999-999):9]:89=
(100-99:9):89=
(100-11):89=
89:89=
1