Activate an Inactive expression:

Activate different parts of an inactive expression:

Define an inactive expression:

Evaluate the expression using Activate :

Create an inactive expression using Inactivate :

Evaluate the expression:

Inactivate the symbol g only:

Activate g:

Inactivate g and h:

Activate h:

Activate an inactive expression:

Activate all symbols except Integrate :

Prevent numeric functions from being activated:

Formally differentiating a Laplace transform:

Similarly differentiating wrt t and a:

Inactive special function expression:

Expression after automatic simplification:

Define a trigonometric expression with two inactive terms:

Activate different parts of the expression:

Define , leaving both the derivative and integral inactive:

Differentiate the integral without evaluating the integral:

Activate the integral to compute the final result:

Integrate without performing the differentiation:

Activate the differentiation to compute the final result:

The results are mathematically the same:

Solution for the three-dimensional Laplace equation in inactive integral form:

Obtain a particular solution by specifying the function f:

Visualize the solution:

Verify the solution:

Formula for summation by parts:

Verify the formula in a special case:

Evaluate the sum:

Explore vector identities:

Activating Curl is not very interesting:

Activating Div demonstrates the relation TemplateBox[{{(, TemplateBox[{v, }, Curl], )}, }, Div]=0:

Inactive expressions can be evaluated using Activate :

Activate is the inverse of Inactivate :

Activate replaces all instances of inactive symbols in an expression:

Activate evaluates inactive expressions and allows parts of expressions to be inactive:

ReleaseHold evaluates expressions held in unevaluated form, and all parts are evaluated:

Create a gallery of infinite products: