Ответ:

  1. \( (8x)^2=8^2x^2=64x^2 \).
  2. \( \left(\frac13a^2\right)^3=\frac1{27}a^6 \).
  3. \( (0.2y^3)^4=0.2^4y^{12}=0.0016y^{12} \).
  4. \( (4xy)^3=64x^3y^3 \).
  5. \( (8a^2b)^2=64a^4b^2 \).
  6. \( (2a^2c^3)^3=8a^6c^9 \).
  7. \( \left(-\frac12ab\right)^3=-\frac18a^3b^3 \).
  8. \( (-10a^3b^2)^4=10000a^{12}b^8 \).
  9. \( (-xy^2z^3)^5=-x^5y^{10}z^{15} \).
  10. \( -(2ax^2)^2=-4a^2x^4 \).
  11. \( -(-4x^3c)^3=64x^9c^3 \).
  12. \( -(-a^2b^3c^4)^4=-a^8b^{12}c^{16} \).