Maths

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Across
  1. 2. the mathematical study of change
  2. 3. triangle-based maths
  3. 5. the order of operations
  4. 6. the man who discovered gravity
Down
  1. 1. the man who made the theory of relativity
  2. 2. a study of the strong force of the universe
  3. 4. a study of the electric force of the universe