# How to insert a Boolean algebra equation

**De Morgan's law**.

How to add an equation in your document, see Working with Microsoft Equation.

To add operators of Boolean algebra, do the following:

In the * Professional* presentation:

** 1. ** Create your own equation.

** 2. ** Under **Equation Tools**, on the **Design** tab,
in the **Structures** group, click the **Accent** button:

In the **Accent** list choose **Bar**:

** 3. ** In the box:

** 3.1. ** Enter ** A**.

** 3.2. ** Under **Equation Tools**, on the **Design** tab,
in the **Symbols** group, in the list of symbols choose **Union**
.

** 3.3. ** Enter ** B**.

** 4. ** Then enter ** =**.

** 5. ** Under **Equation Tools**, on the **Design** tab,
in the **Structures** group, click the **Accent** button and then choose **Bar**. In the box
enter ** A**.

** 6. ** Under **Equation Tools**, on the **Design** tab,
in the **Symbols** group, in the list of symbols choose **Intersection**
.

** 7. ** Under **Equation Tools**, on the **Design** tab,
in the **Structures** group, click the **Accent** button and then choose **Bar**. In the box
enter ** B** :

In the * Linear* presentation:

** 1. ** Create your own equation.

** 2. ** Enter ** (A \cup**. Then you enter a space
key, this linear formula transformed to the professional format:

** 3. ** Enter ** B) \bar** and then a space bar:

** 4. ** Enter ** =** :

** 5. ** Enter ** A \bar \cap B \bar**. Then you enter
a space key, your linear formula transformed to the professional format:

See also how to create other types of equations.