Integrate $\frac{1}{\sqrt{4-x^2}}$
125069
Help with $\int \frac 1{\sqrt{a^2 - x^2}} \mathrm dx$
104691
Integration of $\int_{0}^{1} \frac{x^k}{1-x} dx$
108554
Integrating $\int_0^\infty\frac{1}{1+x^6}dx$
138968
how to integrate $\frac{1}{\sqrt{e^{2x}+e^x+1}}$
62840
Seemingly Simple Integral $\int_0^1\frac{x^2\ln x}{\sqrt{1-x^2}}dx$.
123500
Integration of $\frac {1}{1+\sin x}$
89387
Integrate : $\int \frac{x^2}{(x\cos x -\sin x)(x\sin x +\cos x)}dx$
120899
Integration with a constant "a": $ \int_0^a \frac1{\sqrt {a^2-x^2}} dx $
53438
I need assistance in integrating $ \frac{x \sin x}{1+(\cos x)^2}$
61740
Evaluate the integration : $\int\sqrt{\frac{(1-\sin x)(2-\sin x)}{(1+\sin x)(2+\sin x)}}dx$
100401
Evaluate $\int \frac{1}{(x^2+1)^2}dx$
105765
Integrating $\frac{x^k }{1+\cosh(x)}$
140507
Integrating $\frac{\arctan x}{x\sqrt{\smash[b]{1-x^2}}}$
91306
Integration of $\frac{1}{\log(x)}$
92898
How to integrate $\sqrt{1-\sin 2x}$?
145403
Stuck in integration: $\int {\frac{dx}{( 1+\sqrt {x})\sqrt{(x-{x}^2)}}}$
63016
Integration of $\int\frac{1}{x^{4}+1}\mathrm dx$