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The image you uploaded appears to contain a mathematical problem in Persian, possibly related to set theory or set operations based on the notation \( A \), \( B \), and \( C \). There are references to differences between sets, such as \( A - B \), \( B - C \), etc., which suggest that the problem could involve calculating set differences and their cardinalities (number of elements).

Let me extract the information step by step:

1. **Problem elements:**
   - The sets \( A \), \( B \), and \( C \) are given.
   - There are operations like \( (A - B) \), \( (B - C) \), \( (B - A) \), \( (C - B) \), and \( (C - A) \), which refer to the differences between these sets.
   - The numbers \( 3 \), \( 4 \), \( 5 \), \( 40 \), and \( 203 \) are provided, which likely relate to the number of elements in these sets or the result of the set operations.

2. **Goal:**
   - The question appears to ask which of these numbers corresponds to the cardinality of the set \( (A - C) \), which means the number of elements in set \( A \) that are not in set \( C \).

Would you like me to go ahead with solving this problem, possibly by interpreting these set operations and numbers, or would you like more details about the specific symbols and operations used in this problem? 

Additionally, here are five follow-up questions to expand on this topic:

1. What is the difference between \( A - B \) and \( B - A \) in terms of set theory?
2. How do we calculate the cardinality of a set resulting from a difference operation?
3. Can set operations like union or intersection be included in this type of problem?
4. How can Venn diagrams help visualize problems like these?
5. What real-world applications can be modeled using set operations?

**Tip:** When solving problems involving set operations, always verify if any two sets are disjoint, as it simplifies the calculations considerably.

Given three sets A, B, and C, and the number of elements in the following set operations: (A - B), (B - A), (B - C), (C - B), (C - A). The numbers 3, 4, 5, 40, and 203 are provided. What is the cardinality of the set (A - C)?

Solve a set theory problem involving the sets A, B, and C. This exercise explores set operations like (A - B), (B - A), and cardinalities. Numbers 3, 4, 5, 40, and 203 are provided. Learn how to find the number of elements in the set (A - C). Suitable for students in Grades 10-12.

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