Equation Icon  ( ) 1--z(x) 16f-(x) −-(b2-−-f′x2)ρ w = 8be 16f (x) + (b − f ′)2ρ , ρ x r = f(x)e2z(x)-----------------′2--2, (308 ) (16f (x) + (b − fx) ρ)