Question 16The sum $\dfrac1{2\cdot3\cdot4}+\dfrac1{3\cdot4\cdot5}+\dfrac1{4\cdot5\cdot6}+\cdots+\dfrac1{13\cdot14\cdot15}+\dfrac1{14\cdot15\cdot16}$ is $m/n$ in lowest terms. Find $m+n$.