Chwrerehjeyyreyvrrv croszburd

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Across
  1. 2. an oceanic regoin of countrys
  2. 4. a difficult maths equation
  3. 5. when something blows up
  4. 7. when something is hard to figure out
Down
  1. 1. when two cars crash
  2. 3. a way to remember
  3. 6. a type of change