Math

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Across
  1. 2. horse shoe method
  2. 7. +
  3. 8. starts at 1 ends at ∞
  4. 10. M?={...}
Down
  1. 1. starts at 0 ends at ∞
  2. 3. -
  3. 4. x
  4. 5. ➗
  5. 6. 12:15
  6. 9. we have it on Friday