Cruzes crossword so super hard

Edit Answers
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Across
  1. 6. 260/2
  2. 8. 3000000000000-2000000000000
  3. 9. 60/2
  4. 10. 8^2-4
Down
  1. 1. 69x2-69
  2. 2. 16/4
  3. 3. 1000000-1000000
  4. 4. 100-99
  5. 5. 100/5
  6. 7. 2-(-6)