Perform the Indicated Operations $\frac{2 x^{2}+9 x-5}{18 x^{6}-9 x^{5}} \cdot \frac{3 x^{6}-9 x^{5}-30 x^{4}}{x^{4}-26 x^{2}+25}$

Essay

Perform the indicated operations.
(a) $\frac{2 x^{2}+9 x-5}{18 x^{6}-9 x^{5}} \cdot \frac{3 x^{6}-9 x^{5}-30 x^{4}}{x^{4}-26 x^{2}+25}$
(b) $\frac{2 x}{x^{2}-x-12}-\frac{x}{2 x^{2}-7 x-4}$
(c) $\frac{2 a+b}{3 u-v}-\frac{2 a-b}{v-3 u}$
(d) $\frac{\frac{3}{k}-k}{k-\frac{9}{k}}$