math Crossword Puzzle

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Across
  1. 1. x to the power of __
  2. 3. the inside of a shape
  3. 6. a+bi
  4. 7. makes things lower multiples of itself
  5. 8. f(x)
Down
  1. 2. makes things less
  2. 4. addend+addend=sum
  3. 5. X