# Expressions

With Synthetic Variables, you can apply different operations to the time-series data to create an adjacent dataset containing computed values. The following are the different types of synthetic variables that you can create:

|                                                            Basic                                                           |                                                                                                                         Advanced                                                                                                                        |
| :------------------------------------------------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
|                  <ul><li><a href="/pages/0RQMCTtl8SHrV7xwt5tP"><strong>Mathematical</strong></a></li></ul>                 | <ul><li><a href="/pages/J4JtQ9QMFXEKASftuqDR"><strong>Date range</strong></a></li><li><a href="/pages/O0tOFbm8mhT7VQ8je5LB"><strong>Rolling</strong></a></li><li><a href="/pages/abFbUhNSqgSrBJjYFO66"><strong>Special functions</strong></a></li></ul> |
| <p>Available in:</p><ul><li>STEM</li></ul><p><br><a href="https://ubidots.com/pricing">Learn more about our plans.</a></p> |                                           <p>Available in:</p><ul><li>Professional</li><li>Industrial</li><li>Enterprise</li></ul><p><a href="https://ubidots.com/pricing">Learn more about our plans.</a></p>                                          |

These expressions can be used with the following arithmetic operators and mathematical constants:

* **Addition:** +
* **Subtraction**: -
* **Division**: /
* **Multiplication**: \*
* **Exponentiation: \*\***
* **Module**: %
* **π :** pi
* **Euler's number**: e


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