$${ \left( \sqrt{ \sqrt{ \frac{ 1 }{ 64 } } } - \frac{ 2 }{ 3 } \right) }^{ -1 }$$
$\frac{-18\sqrt{2}-48}{23}\approx -3.193732353$
$\frac{6 {(-3 \sqrt{2} - 8)}}{23} = -3.193732353161553$
