Perform the Indicated Operations Involving Rational Expressions $\frac { 6 n ^ { 2 } + 30 n - 36 } { 3 n ^ { 2 } + 10 n - 48 } \cdot \frac { 6 n ^ { 2 } - n - 40 } { 10 n ^ { 2 } + 15 n - 25 }$

Short Answer

Perform the indicated operations involving rational expressions. Express the final answer in simplest form. $\frac { 6 n ^ { 2 } + 30 n - 36 } { 3 n ^ { 2 } + 10 n - 48 } \cdot \frac { 6 n ^ { 2 } - n - 40 } { 10 n ^ { 2 } + 15 n - 25 }$