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

Short Answer

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