\[I(x)=\sum_{j=0}^{n-1}a_{j}\mathscr{M}\mskip-3.0muh\mskip 3.0mu\left(j+\alpha%
\right)x^{-j-\alpha}+\sum_{k=0}^{n-1}b_{k}\mathscr{M}\mskip-3.0muf\mskip 3.0mu%
\left(1-k-\beta\right)x^{-k-\beta}+\delta_{n}(x)\]