Gavyn's Number Puzzle

123456789
Across
  1. 2. 5 to the 3rd power
  2. 3. square root of 76
  3. 5. 65789 minus 36783
  4. 7. 8x square root of 2
  5. 9. 8 to the 4th power
Down
  1. 1. 10 to the 6th power plus 50 plus 78 minus 28
  2. 4. 9 to the power of 3
  3. 6. square root of 4857
  4. 7. square root of 13679
  5. 8. 3 to the power of 2 then add 41