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calculati:
(×+1/2)la puterea a 2 a

(×+3/2)la puterea a 2 a

(×+2/3)la puterea a 2 a

(2×+1/4)la puterea a 2 a

(3×+2/3)la puterea a 2 a

(4×+1/5)la puterea a 2 a