The first argument to int for indefinite integration must be of type algebraic. In other words, it must be an expression and not an operator, procedure, equation, set, list, Array, or table.

Example 1

The command int cannot take an equation as the first argument.

Solution:

Instead, try the following

Example 2

In this example, the functional operator passed as the first argument will cause an error.

Solution 1:

Use the expression  for the first argument instead.

Solution 2:

Instead, define the function , then use  as the first argument.

Example 3

The same error can occur when using the 2-D math integral notation:

Solution:

As in the previous example, you can either use an expression or define the function , then use  as the first argument.

int, int/details, type/algebraic