Silly Simon's Math Crossword 👍✂️😙🧐🤓🥸🥳🙂‍↔️

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Across
  1. 2. 777-771+1-1+33-33
  2. 5. 19+1-1+1
  3. 6. square root of 900
  4. 8. 20x2+100-100
Down
  1. 1. 7999+1
  2. 3. seven 86+1
  3. 4. 1-1
  4. 5. 1+1
  5. 7. square root of 9
  6. 9. 11+1