2
64*b + 128*b + 64
------------------
/4 \
b*|- + 4|
\b /
(64*b^2 + 128*b + 64)/((b*(4/b + 4)))
2
64 + 64*b + 128*b
------------------
4 + 4*b
2 64 64*b 128*b ------- + ------- + ------- 4 + 4*b 4 + 4*b 4 + 4*b
64/(4 + 4*b) + 64*b^2/(4 + 4*b) + 128*b/(4 + 4*b)
/ 2 \
64*\1 + b + 2*b/
-----------------
4 + 4*b
64*(1 + b^2 + 2*b)/(4 + 4*b)
(64.0 + 64.0*b^2 + 128.0*b)/(b*(4.0 + 4.0/b))
(64.0 + 64.0*b^2 + 128.0*b)/(b*(4.0 + 4.0/b))