Why absolute values of Jacobians in change of variables for multiple integrals but not single integrals?
111725
On the absolute value of Jacobian determinant - variable transformation in multi-integral
48920
Mean value theorem for integrals: how does the sign matter?
29076
Two different solutions to integral
119700
Integrating real valued functions
43385
Why is $\frac{\operatorname dy'}{\operatorname dy}$ zero, since $y'$ depends on $y$?
47779
Why does this integral have a complex component?
146353
Is there a way to rewrite integrals in Mathematica using u substitution?
91196
Complex Integration of $\int_0^\infty e^{-ax}\cos(bx)\,dx$
109192
Intuitive reason why $ \frac1j > \int_{j}^{j+1} \frac1x dx $ for $j$ < $x$
38804
Wrong Wolfram|Alpha limit? $ f(x,y) = \frac {xy}{|x|+|y|} $ for $(x,y)\to(0,0)$
110113
Definite and Indefinite integral give different results for piecewise function
90780
Why does implicit differentiation work on non-functions?
140860
Variable substitution when integrating with Mathematica
93276
A question on applying Residue Theorem to definite real integral
151864
Derivative of the Absolute Value Function in Mathematica looks very different from the actual answer
123911
Why is the derivative of a vector orthogonal to the vector itself?
61585
Why is area of a surface of revolution integral $2\pi y~ds$? not '$dx$'?