Daily Crossword #6

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Across
  1. 3. A delicious cow
  2. 6. Australia's first PM
  3. 7. A good day to get married
Down
  1. 1. 5+10-10=?
  2. 2. 10-3=?
  3. 4. Too many nights spent at work
  4. 5. A man's best friend