Using differentials in integration by substitution
27812
Understanding the differential $dx$ when doing $u$-substitution
17267
Interchanging the order of differentiation and summation
112868
calculate an integration by using residue theorem
10790
Integration of a function with respect to another function.
128023
Recursive formulas and integration
137648
What is the mistake in doing integration by this method?
8408
What is $dx$ in integration?
27127
Calculating $\iint (x+y) \, dx \, dy$
34565
How do I differentiate this integral?
124677
Substitution needed for calculating an integral
32642
The formalism behind integration by substitution
33278
$\delta$ differential notation
119700
Integrating real valued functions
22768
Solving a double integration in parametric form
136556
how to simplify symbolic integration
75168
Exact Differentials
85085
Simplifying the derivative of $|x|$