It looks like you've uploaded an image that contains a set of math problems related to sets, Cartesian products, and possibly set operations. I'll interpret and help you solve the problems based on what I can see. Here are the questions I can clearly read from the image:

1. Find the Cartesian products for sets X and Y:

   • Example: $X = \{2, 5\}, Y = \{1, 3, 4\}$
     • Find $X \times Y$, $Y \times X$, $X^2$, and $Y^2$
     • Representation using arrow diagrams

2. Other Cartesian products and set operations:

   • $X = \{2, 5\}, Y = \{1, 3, 4\}$
     • $X \times X$
     • Represent using arrow diagrams

3. Perform various operations with different sets:

   • If $X = \{1, 2\}, Y = \{3, 4\}, Z = \{4, 5\}$
     • Find:
       a) $X \cup Y$
       b) $X - Y$
       c) $(X \cup Z)$
       d) $(X \cap Z)$

4. Set membership operations:

   • If $X = \{2, -1\}, Y = \{4, 0\}, Z = \{6, 3\}$
     • Find:
       a) $X \cup Y$
       b) $Y \times Z$
       c) $X \cap Z$

5. Cardinality and set notation:

   • Find the number of elements in certain sets:
     a) $n(X \cup Z)$

Would you like to begin with a specific question, or should I walk through all of them one by one? Let me know!