Addition and Subtraction

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Across
  1. 3. 9877+2404
  2. 5. 8917-7856
  3. 8. 9120-3261
  4. 9. 9096-4126
Down
  1. 1. 8779-1063
  2. 2. 8383+1542
  3. 4. 75630-6415
  4. 5. 8875+8577
  5. 6. 8269+2370
  6. 7. 1451+2352