Is a closed-form expression of this non-linear expression attainable?
22077
Closed form for the sequence defined by $a_0=1$ and $a_{n+1} = a_n + a_n^{-1}$
101908
Solving summations of form $\sum_{i=0}^{\infty} i^kx^i$ without Differentiation and Integration
8705
Evaluation of $\sum_{x=0}^\infty e^{-x^2}$
105497
A function satisfying a series equation
158447
Limit as $(x,y)$ approaches $(0,0)$ of $(1+x^2+y^2)^{\frac{1}{x^2+y^2+xy^2}}$
133160
Closed form for $\int_0^\infty\frac{1}{(1+x^2)^s}\,dx$ when $s\in (0.5,\infty)\setminus\mathbb{N}$
75417
Detect highest order of derivative in expression?
151400
Closed-form of $\int_0^1 \operatorname{Li}_p(x) \, dx$
108518
Parametric Form for a General Parabola
1416
closed form of $\int_{0}^{2\pi}\frac{dx}{(a^2\cos^2x+b^2\sin^2x)^n}$
378
Does $\hat{\beta}=(X′X)^{−1}X′ \ Y$ simplify further?
145835
Closed form for CRT solution using Euler $\phi\,$ (totient)
10141
Find closed form expression for series expansion coefficients
20280
Proving that expression is equivalent to the definition of derivative
47753
Closed form of series with factorial-squared denominator?
57411
Manipulating only the denominator in the solution of a fourth order equation
119606
Closed form of summation