integer and Order of operation rules crossword puzzle

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123456
Across
  1. 3. M in PEMDAS
  2. 5. first step of PEMDAS
  3. 6. the E in PEMDAS
Down
  1. 1. part of the final step of PEMDAS
  2. 2. the first member of a "Family" in PEMDAS
  3. 4. second to last letter in PEMDAS