math'n stuff (dashes needed)

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Across
  1. 4. (5x7)+(3x6)+3
  2. 6. 8^5-63
  3. 7. (-9)+(+11)
  4. 9. (9x8)+(6x3)+9
Down
  1. 1. (10^11)+(5x10)+9
  2. 2. (5^5+75+67)/9+2
  3. 3. (5^4+75)+(9x7)+37
  4. 4. {the meaning of life} (7^2+3)-10
  5. 5. (5x5)-4
  6. 8. (10x10)-87