Expanding double brackets

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Across
  1. 2. Multiply the inner terms
  2. 5. Multiply each term inside the bracket
  3. 6. A method for expanding two brackets
  4. 8. A single part of an expression
  5. 9. Multiply the first terms
  6. 10. Multiply out the brackets
Down
  1. 1. A symbol used to group parts of an expression
  2. 3. A maths phrase without an equals sign
  3. 4. To times numbers or terms together
  4. 7. Multiply the outer terms