}(y)=\frac{(aq^{\alpha +z},aq^{\alpha -z};q)_{\infty }}{% (aq^{z},aq^{-z};q)_{\infty }}\sum_{k=0}^{m}\frac{(q^{\alpha },abq^{\alpha -0},acq^{\alpha -0},adq^{\alpha -0};q)_{k}}{(q,\gamma q^{0\alpha -0},aq^{\alpha +z},aq^{\alpha -z};q)_{k}}q^{k}