The expression in the image seems to represent the following mathematical formula:

$\frac{\sqrt{g^2 + a^2}}{g}$

This is a fraction where the numerator involves a square root of $g^2 + a^2$, and the denominator is $g$. This kind of expression often appears in trigonometry, physics, or geometry, particularly when dealing with the Pythagorean theorem or vectors.

Would you like me to simplify or solve this expression further, or would you like a deeper explanation of its use in specific contexts?

Feel free to ask if you have any additional questions! Here are some related topics that might interest you:

1. How to simplify expressions involving square roots.
2. The Pythagorean theorem and its connection to this formula.
3. What are the applications of such expressions in physics (e.g., velocity, distance)?
4. The concept of normalization in vector calculus.
5. How this expression could relate to trigonometric functions like sine or cosine.

Tip: When you have square roots in an expression like this, look for ways to rationalize or simplify them by factoring or applying trigonometric identities.