Integer Crossword Puzzle

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123456789101112
Across
  1. 5. 6x5+2x2(Has dash)
  2. 6. 12x5+30+(2+3)
  3. 8. (2x3+2)x3 (Has dash)
  4. 11. 23-7
  5. 12. (2+4)x3-1
Down
  1. 1. 6x9-7+8-1(Has dash)
  2. 2. 30+6(Has dash)
  3. 3. (1+2)x6
  4. 4. 8x2+3
  5. 7. 16/(4-2)/2-1
  6. 9. 3x2+5
  7. 10. 63/7