Math

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Across
  1. 2. 44+55
  2. 6. 0!
  3. 7. 4!
  4. 8. 160-130
  5. 9. 161-98
Down
  1. 1. 8*12
  2. 3. 32+53
  3. 4. 7*7
  4. 5. study of patterns, both practical and abstract