For b: \(\log_5w+\frac{\log_5u}{3}-\frac{\log_5v}{3}\rightarrow \log_5w+\frac{\log_5u/v}{3} \rightarrow \log_5w+\log_5((\frac{u}{v})^{1/3})\rightarrow \log_5(w(\frac{u}{v})^{1/3})\)
or you could express this as \(\frac{\log_5(w^3u/v)}{3}\)
For e you should have 2x, not just 2.