Evaluate the integral: ∫ (x² - 1) / (x² + 1) dx

Описание: Integrate (x² - 1) / (x² + 1)
integrate x^2 1 x^2 1 2
integral x^2/(1+x^2)^2 dx
integrate x^2 1(x^4 + 1)
1-x^2/1+x^2 formula
integrate [(x^2 + 1)/(x^2 - 1)]dx
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