Set Theory Symbols

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Across
  1. 2. A = B
  2. 3. |
  3. 6. A ⊆ B
  4. 7. A ⊇ B
  5. 8. A ⊄ B
  6. 11. (a,b)
  7. 12. Ac
  8. 13. |A|
  9. 14. {Z}
Down
  1. 1. {Q}
  2. 4. A - B
  3. 5. 2A
  4. 9. { }
  5. 10. {U}