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3. Calculaţi:
a) 3•2²+(-5):(-5)*;
c) 7³ :(−7)² + (−1)²″*¹, n=N;
b) (−48): (−2)³ +100:(-5)² ;
d) [3³+ (-5)'] : [(-2)² + 3³ ];
9.