How do you use the Weierstrass substitution or do contour integration for this integral?
119497
How to evaluate the following items in mathematical methods in physics?
15625
Computing $\int_0^\infty\mathrm{d} x\frac{x}{e^x+1}$ with contour integration
138230
Evaluate $ \int^{\frac{\pi}{2}}_0 \frac{\sin x}{\sin x+\cos x}\,dx $ using substitution $t=\frac{\pi}{2}-x$
29296
Are there any special rules when making a substitution in an integral?
154067
Not sure how to go about solving this integral
135813
Soving a Complex Integral along a circle
34565
How do I differentiate this integral?
137648
What is the mistake in doing integration by this method?
42789
Integrate by Partial Fractions or Substitution
31529
Integrating $\int^2_{-2}\frac{x^2}{1+5^x}$
67186
Complex analysis integration question
117101
Integrate $\int \frac{dx}{\sqrt{-ax^2 + bx +c}} $
98757
Solving an integral with substitution method
124401
How to evaluate $\int_0^{2\pi}\frac{1}{(1+a\cos {\theta})^2}\,d\theta$ without contour integration?
43506
Contour integral of $\sqrt{z^2-1}$ on $|z| = 2$
42992
How do I integrate the following? $\int{\frac{(1+x^{2})\mathrm dx}{(1-x^{2})\sqrt{1+x^{4}}}}$
81533
Integrating $\int_1^2 \int_0^ \sqrt{2x-x^2} \frac{1}{((x^2+y^2)^2} dydx $ in polar coordinates