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[500-(3500:700x80-40x9)x(64:8)]:9-(72:6):(81:27)


Răspuns :

[500-(5*80-360)*8]:9-12:3= [500-(400-360)*8]:9-4= [500-40*8]:9-4= [500-320]:9-4 180:9-4= 20-4=16