2c c

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2c c. D2c. D^2-C^2/D-C. %2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2. (2cd/2c+d)*((2c+d/2c-d) -2c-d) +2cd сократить.


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