E668 -- De integratione formulae \(\int \frac{\partial x \sqrt{1+x^4}}{1-x^4}\) aliarumque eiusdem generis per logarithmos et arcus circulares

(On the integration of the formula \(\displaystyle \int \frac{\partial x \sqrt{1+x^4}}{1-x^4}\) and of others of the same type by logarithms and circular arcs)


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