New posts in Closed Form Expressions

Is this closed-form summation a special case of known Lerch zeta function formulas?

Closed form for $\sum_{j=0}^{\infty}{\alpha \choose j} {\beta \choose j}x^j$

Invertibility of specific function

Difficult trigonometric integral

Is there a closed form for $\int_0^\infty\frac{\tanh^3(x)}{x^2}dx$?

How do i solve this : $\displaystyle \ f'=e^{{f}^{-1}}$?

How to prove that $\int _0^\infty\frac{\text{arcsinh}^nx}{x^m}dx$ is a rational combination of zeta values?