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Calculati: (x+1)la puterea 2; (x+3) la puterea 2; (2x+1) la puterea 2; (3x+2)la puterea 2; (2x+5)la puterea 2; (3+2x) la puterea 2; (1+7x)la puterea 2; (3+5x) la puterea 2.Ajutooooor!!