Math Puzzle

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Across
  1. 3. A tool that solves equations
  2. 5. The highest power of the variable.
  3. 7. The best math teacher ever
  4. 10. The set of input values
  5. 11. Two terms
  6. 13. A frown or a smiley face
Down
  1. 1. Involves squares and and parabolas when solving
  2. 2. A number multiplying a variable
  3. 4. Undos exponents in math
  4. 6. A symbol that represents a number
  5. 8. Three terms
  6. 9. A single number or variable
  7. 12. The set of output values