Crossnumber

123456789
Across
  1. 2. 11 + sqrt(-4 + 6×4÷3)
  2. 4. Simplify: (x4 / x3)3
  3. 7. 10/2/2/2/2*4
  4. 8. 50+20
  5. 9. 1/10
Down
  1. 1. 30 - 12÷3×2 =
  2. 3. 1/1000
  3. 5. -5x + 20 = 25 x=?
  4. 6. -18 + 4(6 ÷ 2)/\2