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(-34+28)[(+54):(-9)+(-56):(-8)+(-42):(+7)]​

Răspuns :

( -34 + 28 )[( +54 ) : ( -9 ) + ( -56 ) : ( -8 ) + ( -42 ) : ( +7 )]​ =

= -6 [ -6 + 7 + ( -6 )] = -6 ( -6 + 7 - 6 ) = -6 ( 1 - 6 ) = -6 · ( -5 ) = 30