What am I doing wrong in this attempt to solve this integral?
59792
Can someone explain how integration by parts was done?
19556
Finding constant to make integrals converge
31529
Integrating $\int^2_{-2}\frac{x^2}{1+5^x}$
123532
An incorrect answer for an integral
146579
What is the right first step to take when integrating $1/(2+ \sin x + \cos x)$?
149723
Can I have some assistance in proving this integral?
16800
Integrating $\int_0^{2\pi} \frac1{a\cos(t)+b\sin(t)+c}dt$ with $\sqrt{a^2+b^2}=1<c$
87373
Setting up limits of integration in this double integral
116778
Calculation of an integral via residue.
31493
Complex integral help involving $\sin^{2n}(x)$
141999
How to integrate this nasty integral
117101
Integrate $\int \frac{dx}{\sqrt{-ax^2 + bx +c}} $
112868
calculate an integration by using residue theorem
75067
Compute this integral
41372
Stuck on crucial step while computing $\int_{- \infty}^{\infty} e^{-t^2}dt$
130668
Evaluating the integral with trigonometric integrand
12432
Seemingly impossible double integral reduction