Class 7, Algebraic expression, find the value of the following expression putting the values, X = 1, Y = 2, Z= -1

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Across
  1. 1. (y/x -y/z)
  2. 4. x^2y^4z^2
  3. 5. (x^3 + y^3 -z^3)
  4. 6. (xy -yz)-xyz
  5. 7. xyz - yz
  6. 9. x^2y^2 + y^2z^2
  7. 11. (x^4 + y^4 + z^4)
  8. 12. xy^4 + z^3
Down
  1. 2. 2(x -y)-3z
  2. 3. (x^4 + y^4 + z^4)/(x+y+z)
  3. 5. 2(x^2 + y^2 + z^2)
  4. 6. 2x + 3y +z
  5. 8. 10(x^3 + y^3 + z^3)/4
  6. 10. xy - yz + zx