Symbols of Set Theory Crossword

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123456789101112131415
Across
  1. 3. { }
  2. 4. A ⊅ B
  3. 6. #A
  4. 7. A ⊄ B
  5. 10. A - B
  6. 12. A ∪ B
  7. 14. (a,b)
  8. 15. A = B
Down
  1. 1. A ∆ B
  2. 2. A ∩ B
  3. 5. A ⊇ B
  4. 8. A ∪ B
  5. 9. A×B
  6. 11. |
  7. 13. Ø