Algebra: Polynomials

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Across
  1. 2. 8 more than z
  2. 4. (a3+3b-27) + (7a3-6b=2)=
  3. 7. 4p less than 8qr
  4. 10. 14 more than 2x
  5. 11. Thirteen times s minus nine times j
  6. 15. x-18, if x=35
Down
  1. 1. (5y3+3y2-7y+10) - (3y3-y2+4y-1)=
  2. 3. 2mn2, m=3 and n=4
  3. 5. (m3+2m2-4) - (5m3-3m2-5)=
  4. 6. x diminished by 7
  5. 8. Sum of p and 2pq
  6. 9. Divide m2 by 9
  7. 12. 18 more than 3x
  8. 13. Negative 6 multiplied by d
  9. 14. j multiplied by z