Modern math

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Across
  1. 1. 15 words
  2. 4. symbol 15 words
  3. 6. and probability 15 words
  4. 8. letters 15 words
Down
  1. 2. symbols 15 words
  2. 3. math symbols 20 words
  3. 5. algebra symbols 10 words
  4. 7. theory 15 words