Solving integral 1/(1+x^2)
128572
How $\int_{-\infty}^{\infty}\frac{dx}{1+x^2}$ exists?
69234
Solving Diophantine equation $1/x^2+1/y^2=1/z^2$
108554
Integrating $\int_0^\infty\frac{1}{1+x^6}dx$
154067
Not sure how to go about solving this integral
143734
Evaluating $\int \frac{\sin\left(x\right)}{1+x^2}dx$
132388
Calculate $I=\int_0^1\frac{\ln(1+x)}{1+x^2}\,dx$
100401
Evaluate $\int \frac{1}{(x^2+1)^2}dx$
67629
How to evaluate these indefinite integrals with $\sqrt{1+x^4}$?
39629
Indefinite integration of $\int \frac{1}{1+\sqrt{x^2+2x+2}}dx$
47452
Calculus Question: $\int_0^1\frac{(x-x^2)^4}{1+x^2}dx$
120388
Evaluate $\int\frac{1}{1+x^6} \,dx$
109385
Evaluating the integral $\int_{-\ln 2}^{\ln 2} e^{-x}(\sin x+x)^{1/3}dx$
149341
Help me evaluate $\int_0^1 \frac{\log(x+1)}{1+x^2} dx$
112885
Integrate $1/x$ by parts.
8642
Calculate $ \int_{-2}^{0} \frac{x}{\sqrt{e^x+(x+2)^2}} dx $
32312
Evaluating the integral $\int \frac{x^2+x}{(e^x+x+1)^2}dx$
152977
Integrate $\int\sqrt{x+\sqrt{x^{2}+2}} dx$ .