86. Упростите выражения: 1) (2x^3y^2z)^4; 2) (−3a^2b^4c^5)^3; 3) (−3/5)^3; 4) (a/(2b))^4.

1. \( (2x^3y^2z)^4=2^4x^{12}y^8z^4=16x^{12}y^8z^4 \).
2. \( (-3a^2b^4c^5)^3=(-3)^3a^6b^{12}c^{15}=-27a^6b^{12}c^{15} \).
3. \( \left(-\frac{3}{5}\right)^3=-\frac{27}{125} \).
4. \( \left(\frac{a}{2b}\right)^4=\frac{a^4}{16b^4} \).

Ответ: 1) \(16x^{12}y^8z^4\); 2) \(-27a^6b^{12}c^{15}\); 3) \(-\frac{27}{125}\); 4) \(\frac{a^4}{16b^4}\).