1.2 Exercise 18

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

1. ⓐ $\left(2 u v^{- 2}\right)^{−3}$
2. ⓑ $x^{8} \cdot x^{−12} \cdot x$
3. ⓒ $\left(\frac{e^{2} f^{- 3}}{f^{−1}}\right)^{2}$
4. ⓓ $\left(9 r^{−5} s^{3}\right) \left(3 r^{6} s^{−4}\right)$
5. ⓔ $\left(\frac{4}{9} t w^{−2}\right)^{−3} \left(\frac{4}{9} t w^{−2}\right)^{3}$
6. ⓕ $\frac{\left(2 h^{2} k\right)^{4}}{\left(7 h^{−1} k^{2}\right)^{2}}$