Q85. Let $L _ { 1 } , L _ { 2 }$ be the lines passing through the point $P ( 0,1 )$ and touching the parabola $9 x ^ { 2 } + 12 x + 18 y - 14 = 0$. Let $Q$ and $R$ be the points on the lines $L _ { 1 }$ and $L _ { 2 }$ such that the $\triangle P Q R$ is an isosceles triangle with base $Q R$. If the slopes of the lines $Q R$ are $m _ { 1 }$ and $m _ { 2 }$, then $16 \left( m _ { 1 } ^ { 2 } + m _ { 2 } ^ { 2 } \right)$ is equal to\\
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