Question

1+{2+[3×(4+5)-6+7×8]-9}
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Answer 1

1+[2+(3×9-6+56)-9]=

=1+[2+(27-6+56)-9]

=1+[2+(21+56)+9]

=1+(2+77+9)

=1+88

=89

Answer 2

Aceasta este rezolvarea.