Analyze the image and determine the mathematical expressions shown.

Mathematical Expressions:

The image displays three mathematical expressions using a combination of symbols and numbers:

• First expression: \( 6 \cup \square = 1 \)
• Second expression: \( C + C = 6 \)
• Third expression: \( \cdot \rfloor + C = \Gamma \)

Note: The symbols \( \cup \), \( \square \), \( C \), \( \cdot \rfloor \), and \( \Gamma \) appear to be custom or from a specific symbolic language. The number '6' is clearly legible. Based on the second expression, it can be inferred that \( C = 3 \).