$$0.512(2)(1)(( \frac{ \sqrt{ 0.75 } }{ 1+ \sqrt{ 0.75 } } -0.2(0.75)$$
$\frac{256\sqrt{3}}{125}-3.2256\approx 0.321640054$
$\frac{256 \sqrt{3} - 403.2}{125} = 0.3216400539010606$
