What is the mathematical expression written in the image?

The mathematical expression in the image appears to be:

• `\( \sqrt{ } \cdot (x - 6) \cdot (e - \alpha) \)`
• `\( x^a + k \)`
• `\( \frac{m}{n} \)`
• `e = 0.5`

Note: Some characters are ambiguous and could be interpreted differently.