A great topic!

MathML is a markup language used to write mathematical equations and formulas in a way that can be easily rendered on the web. It's designed to provide a standard way of encoding mathematical notation, allowing for precise representation of mathematical expressions.

Here are some key features and benefits of writing mathematics with MathML:

1. **Standardization**: MathML is an open standard maintained by the World Wide Web Consortium (W3C). This ensures that MathML documents can be shared and rendered consistently across different platforms.
2. **Precise notation**: MathML provides a way to represent mathematical expressions precisely, using XML syntax. This helps avoid common issues like ambiguity in notation or incorrect rendering of equations.
3. **Platform independence**: MathML documents can be rendered on various devices and platforms, including web browsers, PDF viewers, and math software applications.
4. **Accessibility**: MathML enables the creation of accessible mathematical content for people with disabilities. For example, screen readers can interpret MathML equations, making them more readable for visually impaired users.
5. **Search engine optimization (SEO)**: Search engines like Google can index MathML equations, allowing users to search for specific mathematical concepts and find relevant results.

Some examples of how you can write mathematics with MathML:

* Basic arithmetic operations:
```math
<math><mrow><mi>x</mi><mo>+</mo><mn>2</mn></mrow></math>
```
* Fractions:
```math
<math><mfrac><mi>a</mi><mi>b</mi></mfrac></math>
```
* Equations with variables and constants:
```math
<math><mtable><mtr><mtd><mi>x</mi></mtd><mtd><mo>=</mo></mtd><mtd><mn>2x+3</mn></mtd></mtr></mtable></math>
```
* Matrices:
```math
<math><mtable><mtr><mtd><mrow><mi>a11</mi><mo>,</mo><mi>a12</mi></mrow></mtd><mtd><mrow><mi>b11</mi><mo>,</mo><mi>b12</mi></mrow></mtd></mtr></mtable></math>
```
To get started with writing mathematics in MathML, you can:

1. Check out the official MathML specification and syntax documentation.
2. Explore online resources, such as the Mozilla Developer Network's MathML documentation and examples.
3. Use a MathML editor or plugin for your favorite text editor or IDE.

Happy math-ing!