$\int _ { 1 } ^ { 3 } \left( x ^ { 3 } + 3 \right) x ^ { 2 } d x$

Short Answer

$\int _ { 1 } ^ { 3 } \left( x ^ { 3 } + 3 \right) x ^ { 2 } d x$ Enter a reduced fraction of form $\frac { a } { b }$ .