## What is a .SXM file?

The .SXM file extension is associated with a type of file known as a StarMath Formula. This type of file contains a mathematical formula and was originally created using the StarMath software. However, StarMath is no longer in common use, and its functions have been integrated into Apache OpenOffice Math, which is the modern successor to StarMath. Apache OpenOffice Math is part of the Apache OpenOffice suite, which evolved from the earlier OpenOffice.org project.

The .SXM file represents an older format that was used before Apache OpenOffice adopted the more current OpenDocument specification, which is a standard format for office documents including text, spreadsheets, and mathematical data.

To open a .SXM file, you can use several programs that are capable of handling this file format: 1. **OpenOffice Math** - This is a direct successor to StarMath and part of the Apache OpenOffice suite. It is specifically designed for creating and editing mathematical formulas. 2. **LibreOffice Math** - LibreOffice is a fork of OpenOffice and continues to support .SXM files through its Math application, which also focuses on mathematical formulae. 3. **Planamesa NeoOffice** - This is an office suite for macOS that is based on OpenOffice and LibreOffice. It includes support for opening .SXM files through its mathematical module.

These programs allow you to view, edit, and manage .SXM files, ensuring that you can still access and use older mathematical formulas created in StarMath.

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