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15×53-{4×(57(6-2)×7]:3}×6=

Răspuns :

=795-[4*(57*4*7):3]*6=

=795-[4*(228*7):3]*6=

=795-(4*1596:3)*6=

=795-(6384:3)*6=

=795-2128*6=

=795-12768=

= -11973