$\int \sqrt{\frac{1-{x}}{1+{x}}.\frac{1}{x^2}}dx$
6830
Find $\int\frac1x\sqrt\frac{1-x}{1+x}\ dx$
9390
$ \int_1^2\int_1^2 \int_1^2 \int_1^2 \frac{x_1+x_2+x_3-x_4}{x_1+x_2+x_3+x_4}dx_1dx_2dx_3dx_4 $
154491
Evaluate $\int \frac{\sqrt{x^2-1}}{x} \mathrm{d}x$
2487
Integral $\int \frac{\mathrm{d}x}{\sqrt{x}+\sqrt{x+1}+\sqrt{x+2}}$
31529
Integrating $\int^2_{-2}\frac{x^2}{1+5^x}$
47452
Calculus Question: $\int_0^1\frac{(x-x^2)^4}{1+x^2}dx$
104094
Integral of $\frac{1}{(1+x^2)^2}$
102156
Integral of $\int_0^{\pi/2} \frac {\sqrt{\sin x}}{\sqrt {\sin x} + \sqrt {\cos x}}$dx
67608
Integration of $1/(x^2+x\sqrt{x})$
37097
Integral $\int \frac{\sqrt{\sin x}}{\sqrt{\sin x} + \sqrt{\cos x}} dx$
141387
Reduction Integration of $I_n=\int{\frac{x^n}{\sqrt{x^2+a^2}} dx}$
32312
Evaluating the integral $\int \frac{x^2+x}{(e^x+x+1)^2}dx$
58909
Evaluation of $\int\frac{dx}{x+ \sqrt{x^2-x+1}}$
83801
Finding $\int \frac {dx}{\sqrt {x^2 + 16}}$
69978
Evaluating $\int_1^\infty \frac{1}{x(x^2+1)}\ dx$
82408
Integral $\int_{1}^{2011} \frac{\sqrt{x}}{\sqrt{2012 - x} + \sqrt{x}}dx$
83325
Integral of $\frac{\sqrt{x^2+1}}{x}$