3. Calculați: a) 80218-218-(166+138); b) (352 195+96309):56; c) 638-406-54036: (44-209-9117); d) (708-705-75702:93)+96758. [G 4. Calculați: a) 2³ +7; 5° +2.3²; b) 31-5²; c) 4² +30; g) 72:7+13; h) 3³-3²-2; 01)01-0011-01-001 (s d) 2² +2³-3; e) 2ª-4² +5; i) 5-2² -6°; j) 24:2²-5.
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