Math Crossword puzzle

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Across
  1. 2. to get rid of something
  2. 3. a^2 + b^2 = c^2
  3. 5. the best math teacher
  4. 6. a sweet treat
  5. 8. area under a curve
  6. 10. raising a number to a power of 2
  7. 11. raising a number to a power of 3
  8. 12. something Buzz Lightyear says
  9. 14. describes the function's instantaneous rate of change at a certain point
  10. 15. the strongest shape
Down
  1. 1. something we use make graphs and calculate
  2. 4. symbol looks like a cross
  3. 7. relies on something else
  4. 9. line used as a reference for determining position, symmetry, or rotation
  5. 13. a letter that refers to an unspecified math object