\[\int^{\infty}_{0}f(x)g(x)\,\mathrm{d}x=\frac{1}{2\pi\mathrm{i}}\*\int^{\sigma+%
\mathrm{i}\infty}_{\sigma-\mathrm{i}\infty}\mathscr{M}\mskip-3.0muf\mskip 3.0%
mu\left(1-s\right)\mathscr{M}\mskip-3.0mug\mskip 3.0mu\left(s\right)\,\mathrm{%
d}s.\]