Solve the following multiple integral
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 $
29076
Two different solutions to integral
106544
Solve $ \frac{2}{\pi}\int_{-\pi}^\pi\frac{\sin\frac{9x}{2}}{\sin\frac{x}{2}}dx $
61339
Integrating trigonometric function problem $\int \frac{3\sin x+2\cos x}{2\sin x+3\cos x}dx$
40272
Can we find a closed form for this integral?
136385
Integrate $ \int_{0}^{\frac{\pi}{4}}\tan^{-1}\left(\frac{\sqrt{2}\cos3 \phi}{\left(2\cos 2 \phi+ 3\right)\sqrt{\cos 2 \phi}}\right)d\phi$
46244
solve the integral equation 2
31493
Complex integral help involving $\sin^{2n}(x)$
2411
Integrate $\int_0^{\pi/2} \frac{1}{1+\tan^\alpha{x}}\,\mathrm{d}x$
98757
Solving an integral with substitution method
17115
Please tell me how to evaluate this integral.
111956
Evaluating indefinite integrals of the form $\int \frac{x^2 \,dx}{a x^5 + b}$
67326
How to solve $ \int \limits _0 ^{2\pi} \dfrac{dx}{(\alpha +\beta\cos x)^2} $
58947
Integral of $\int\sin^{3}xdx$
41447
tough integral involving $\sin(x^2)$ and $\sinh^2 (x)$
31716
Calculate :$\int_{0}^{2\pi }e^{R{ {\cos t}}}\cos(R\sin t+3t)\mathrm{d}t$
106587
Calculation of an integral with a Bessel function