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7. Efectuați calculele: a) (2⁴)²:2⁶. b) 3¹¹: (3³.3²)²; c) 27³.9²:3¹¹; d) (5⁶) ⁵ : (5³)⁹; e) 125²: 25².5²; f) 343× 49:7⁴; g) (2³.3²)⁰; h) (3.5³)¹; i) (2¹³×5¹²): (2¹⁰× 5⁹).​