Simplifying Exponential Expressions

Simplify each expression and write the answer with positive exponents only.

1. ⓐ $\left(6 m^{2} n^{−1}\right)^{3}$
2. ⓑ $17^{5} \cdot 17^{−4} \cdot 17^{−3}$
3. ⓒ $\left(\frac{u^{−1} v}{v^{−1}}\right)^{2}$
4. ⓓ $\left(−2 a^{3} b^{−1}\right) \left(5 a^{−2} b^{2}\right)$
5. ⓔ $\left(x^{2} \sqrt{2}\right)^{4} \left(x^{2} \sqrt{2}\right)^{−4}$
6. ⓕ $\frac{\left(3 w^{2}\right)^{5}}{\left(6 w^{−2}\right)^{2}}$