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{[(2×4×5-3:2]-5(6+5-2):2=

Răspuns :

(2×4×5-3:2)-(6+5-2):2=
=(40-3:2)-(6+5-2):2=
=(40-1,1)-(11-2):2=
=29-9:2=
=29-8,1=
=20