Два примера 16 баллов~

Решите задачу:

$1)(\frac{v^{10}(v-c)^{5}}{d^{15}(c-d)}) ^{3}:( \frac{v^{2}(v-c)} {d^{3}(d-c)}) ^{15}= \frac{v^{30}(v-c)^{15}}{d^{45}(c-d)^{3}}* \frac{d^{45}(d-c)^{15}}{v^{30}(v-c)^{15}}=-(c-d)^{12}$

$2)\frac{(k+1)^{2}} {169-169k^{3}}: \frac{1-k^{2}} {(13k-13)^{2}}=\frac{(k+1)^{2}} {169(1-k^{3})}* \frac{169(k-1)^{2}} {(1-k)(1+k)}=\frac{k+1}{k^{2}+k+1}$