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Matematico 8. Calculaţi: a) (5° +5¹ +5² +5³): 2²; c) (20+2¹+2²+2³+3²): 2²; b) 66 b) (7⁰+7¹+7²-3²): 24: d) (30+3¹ +3² +3³-2³):2