Equations are the most important part of the scientific document. Writing equations and mathematical expressions are easy in Latex. This tutorial will guide you about writing mathematical equations and expressions.

## Equation mode

There are two mode for writing equation in Latex.

• Inline mode
• Displayed mode

The first method print the equation in the same line after the text. While in the displayed mode the equations are printed in the next line with center-aligned.

## Example of writing equations

Both can be seen in the following example code.

\documentclass[11pt, oneside]{article}
\begin{document}

The basic formula in mathematics are $(a+b)^2 = a^2+b^2+2ab$. This is the example of inline mode.

However, the equation in displayed mode will be
$$(a+b)^2 = a^2+b^2+2ab$$

\end{document}

The output PDF will be look like this.

The dollar sign “\$” is used to write the equation within the text (inline mode). While the and are used for displayed mode.

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