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(589+146):15+(287-269):3=
(307+533):14-85:17+945:21=



Răspuns :

=735:15+18:3
=49+6
=55  

=840:14-5+45
=60-5+45
=55+45
=100
735:15+18:3=
49+6=
=55
840:14-5+45=
60-5+45=
55+45=
=100