I see that you've uploaded a photo containing two math problems. They both ask for simplification and expression in positive integer exponents. Let me first transcribe and analyze both questions, then we can work on simplifying them.

Problem Set A:

1. Sederhanakan dan nyatakan ke dalam bentuk pangkat bulat positif! (Simplify and express in positive integer exponents!)

   a. $(xy^5z^{-3})^2 \cdot x^{-1}y^7z^4$

   b. $a^{-2}bc^6 \cdot (a^3b^{-5}c)^{-4}$

   c. $\frac{(m^{2n-1}z^{-3})^{-3}}{m^{2n-4}z^7} \cdot m^{-3n}z^5$

   d. $\frac{1}{(x^2y^3z^{-2})^{-4}} \cdot \frac{1}{x^{-1}y^3z^8}$

Problem Set B:

1. Sederhanakan dan nyatakan ke dalam bentuk pangkat bulat positif! (Simplify and express in positive integer exponents!)

   a. $(xy^3z^{-1})^{-4} \cdot x^2y^{-2}z^5$

   b. $ab^{-2}c^4 \cdot (a^3bc^{-1})^{-4}$

   c. $\frac{(m^2n^0z^{-1})^{-3}}{m^{-5n}z^2} \cdot m^{-1}n^2z^6$

   d. $\frac{1}{(x^3y^3z^{-2})^{-3}} \cdot \frac{1}{x^2y^5z^4}$

Would you like me to start by simplifying the first problem (Set A) or the second one (Set B)? Let me know which one you'd like to explore further, and if you'd like detailed steps for any specific part!