Math

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Across
  1. 1. -54x+63y+-44
  2. 5. -9x+153
  3. 6. 12x+27
  4. 7. 147y+630
  5. 8. 280x+-229
  6. 9. -7wx+-6x
Down
  1. 2. -51x+33
  2. 3. -72xy+-420
  3. 4. 30x+27
  4. 6. -56x