Substitute and store in another scalar
88254
How do I perform a Perl substitution on a string while keeping the original?
139530
Taking derivatives with respect to a matrix
106263
How do I use the C preprocessor to make a substitution with an environment variable
29535
Use parameter expansion to modify output of another expansion
128867
Inverse of order preserving transformation
100095
Proving replacement theorem?
133326
Putting a subscript beside \det
140860
Variable substitution when integrating with Mathematica
51677
Can we use letter with a subscript as a variable in Mathematica?
116504
Interpolating an Antiderivative
146018
A brace in an equation to say both variables are equal to the same value
81066
How to put a subscript in a superscript
121666
How do I apply both \mathbf and \left to a \langle?
22393
Preforming math stored in variables
32642
The formalism behind integration by substitution
8187
How to create my own math operator with limits?
134740
Derivatives: enter "evaluated at" vertical bar with multiple values as subscripts