Q83. If the second, third and fourth terms in the expansion of $( x + y ) ^ { n }$ are 135,30 and $\frac { 10 } { 3 }$, respectively, then $6 \left( n ^ { 3 } + x ^ { 2 } + y \right)$ is equal to $\_\_\_\_$
Q83. If the second, third and fourth terms in the expansion of $( x + y ) ^ { n }$ are 135,30 and $\frac { 10 } { 3 }$, respectively, then $6 \left( n ^ { 3 } + x ^ { 2 } + y \right)$ is equal to $\_\_\_\_$\\