Equation 9.11.28DF6E62BA10C0

\begin{equation} \begin{gathered} s=\frac{\mathrm{e}^\psi x}{1-x+\mathrm{e}^\psi x},\qquad \ell =\log (1-x+\mathrm{e}^\psi x),\qquad \sigma _\psi =f^*(\omega _ B+\mathrm{dd}^{\mathrm{c}}\psi ),\\ B_\psi =\beta +\mathrm{dd}^{\mathrm{c}}\ell ,\qquad \nu =k(s)B_\psi ^ n,\qquad \mu =\pi _*\nu ,\\ I=\int _0^1 k(r)r^{n-1}\, \mathrm{d} r,\qquad M=ndI. \end{gathered} \end{equation}