Ответ:

  1. \(3\cdot(-4)^2=3\cdot16=48\).
  2. \((-2)^5\cdot3=-32\cdot3=-96\).
  3. \(8^1\cdot7^1=8\cdot7=56\).
  4. \((-0{,}5)^2\cdot(-2)^2=0{,}25\cdot4=1\).