Is there any Laplace inversion formula for any of these equations

$\displaystyle f(s)=\frac{1}{a\sqrt{s+b}+c\sqrt{s/d+b}}$

or

$\displaystyle

f(s)=\frac{\exp{(-k\sqrt{s+b})}}{a\sqrt{s+b}+c\sqrt{s/d+b}}

$

the inversion is easy if $\displaystyle d=1$, but I want to find the general form. Thank you.