i'm just a silly wizard

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Across
  1. 2. The rate of change in different quantities
  2. 5. When combined they form 90 degrees
  3. 7. Triangle
  4. 8. Leaf hates this but elli loves to tell your future with them
  5. 9. The good sounds in leaf's car
  6. 11. Spreading out equally
  7. 13. Shapes
Down
  1. 1. A fun song and the opposite of dog girls
  2. 3. Arithmetic that uses unknown values and numbers
  3. 4. Something elli cannot do that involves two equations
  4. 6. Oldest and most elementary
  5. 10. Something leaf can't eat and what we are
  6. 12. Where sam had their first kiss