\[\int_{0}^{\infty}f(xt)q(t)\,\mathrm{d}t\sim\sum_{s=0}^{\infty}\mathscr{M}%
\mskip-3.0muf\mskip 3.0mu\left(\frac{s+\lambda}{\mu}\right)\frac{a_{s}}{x^{(s+%
\lambda)/\mu}},\]