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a fost răspuns

980+10x{20+5[90-4x21]}-1000

Răspuns :

Romicastefania
=980+10*{20+5[90-84]}-1000=
=980+10*[20+5*6]-1000=
=980+10*[20+30]-1000=
=980+10*50-1000=
=980+500-1000=
=1480-1000=
=480
Sper sa te ajute :D