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• 56 How can I evaluate $\sum_{n=0}^\infty(n+1)x^n$?
• 33 How to obtain the gradient in polar coordinates
• 29 Are there other cases similar to Herglotz's integral $\int_0^1\frac{\ln\left(1+t^{4+\sqrt{15}}\right)}{1+t}\ \mathrm dt$?
• 17 Hermite polynomials recurrence relation
• 16 Evaluating the sum of the series $\sum\limits_{n=1}^{\infty} \frac{1}{n^{3} \binom{2n}{n}} $
• 14 The most complete reference for identities and special values for polylogarithm and polygamma functions
• 13 Inverse Gaussian distribution
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