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3{3+6[9+15(6+6-3)]} Va rog un răspuns

Răspuns :

=3•{3+6•[9+15(12-3)]}
=3•[3+6•(9+15•9)]
=3•[3+6•(9+135)]
=3•(3+6•144)
=3•(3+864)
=3•867
=2.601