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1700-[250:5+20:4x(289-4x65)x12-90]=

Răspuns :

=1700-[50+5*(289-260)*12-90]
=1700-(50+5*29*12-90)
=1700-(50+145*12-90)
=1700-(50+1740-90)
=1700-(1790-90)
=1700-1700
=0