Decoding crossword challinge time!!!

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Across
  1. 3. $3+9$8;*(So_how_this is going to work is more like the crossword strucksher!!!)
  2. 4. *@:3#
  3. 5. (8[>(you need to go to the .?123 secshen)
Down
  1. 1. +49##294$
  2. 2. /7*#
  3. 3. $3/7**8;*