CW by Luke and Sam

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Across
  1. 1. (150.2x100)-100^2-2-300
  2. 3. (1000-300)+5^2+11
  3. 5. (200x4)+500/10+4
  4. 6. (345x2)-400-66+700
  5. 9. (2x300+1000)-1050+9x15-7
  6. 10. 696/2-44)+44
  7. 11. 100^2x20+10x3+2+2
  8. 12. (9x14)-40)+68+400-102
  9. 14. (-60+-50)-50
Down
  1. 1. (1.50x100)+11
  2. 2. 2345-1000+8000-345-10000+500x2
  3. 3. (-56+-56)x7-32
  4. 4. 2/200+600+890/42x2+9^2+50+89+10-3
  5. 6. (1000-22)-500+400+100
  6. 7. 800x5+200/2000+173
  7. 8. (3x262)-300)+90+23-10
  8. 11. 2/400+500-700+35+200+600+100-500-300+2x50
  9. 13. (3x50)+300+150