$\frac{\frac{\mathrm{Vm1}}{\mathrm{K1s}}(\mathrm{s1}-\frac{\mathrm{x2}}{\mathrm{Keq1}})}{1+\frac{\mathrm{s1}}{\mathrm{K1s}}+\frac{\mathrm{x2}}{\mathrm{K1x2}}}$ $\frac{\frac{\mathrm{Vm2}}{\mathrm{K2x2}}(\mathrm{x2}-\frac{\mathrm{x3}}{\mathrm{Keq2}})}{1+\frac{\mathrm{x2}}{\mathrm{K2x2}}+\frac{\mathrm{x3}}{\mathrm{K2x3}}}$ $\frac{\frac{\mathrm{Vm3}}{\mathrm{K3x3}}(\mathrm{x3}-\frac{\mathrm{p1}}{\mathrm{Keq3}})}{1+\frac{\mathrm{x3}}{\mathrm{K3x3}}+\frac{\mathrm{p1}}{\mathrm{K3p}}}$