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calculeaza 3×{2+740:[77-20×(998-249×4)]}-13×5

Răspuns :

3×{2+740:[77-20×(998-249×4)]}-13×5
3*(2+740:(77-20*(998-996)))-65
3*(2+740:(77-20*2))-65
3*(2+740:(77-40))-65
3*(2+740:37)-65
3*(2+20)-65
3*22-65
66-65=1