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 Apr2 accepted How to solve the following equation? $\left(\sqrt{u^2-1}+u\right)^{1/u}=\pi ^{1/\pi }$ Mar10 accepted What function satisfies the following equation? Jan17 accepted Evaluate the double integral $\int _0^1\int _0^1\frac{x+i}{(1-ix y) \ln (x y)} \,dx\,dy$ Jan14 accepted Fourier transform of exponent? Dec18 accepted In dual numbers, what is the value of expressions $0^\varepsilon$ and $\varepsilon^{\varepsilon}$? Dec18 accepted In dual numbers, what number is represented by the following matrix? Dec15 accepted Formula for tangent derivatives, how to prove? Dec2 accepted What is the substitution to remove integration limit from inside an integral? Oct31 accepted How to express this operator through derivetives? Aug23 accepted Is there an easier way to find the “natural” integration constant? Jul19 accepted Proof or source for this Hurwitz Zeta function identity? Jun25 accepted Is there a formula to quickly express delayed functions in terms of finite differences? Jun14 accepted Can any analytic function be represented as a sum of a Newton series and a periodic function? Oct16 accepted Evaluate definite integral $\int_{-1}^1 \exp(1/(x^2-1)) \, dx$ Nov4 accepted What is the value of $\lim_{x\to 0} x^i$? Oct27 accepted Limit $\lim_{x\to \infty } \, \frac{x}{\ln (x)-\ln \left(\frac{1}{x}\right)}$ Mar27 accepted How to express in closed form? Jan28 accepted Linear operator categories Dec30 accepted Tractrix-like curves Dec15 accepted Is it problem of Mathematica or my own?