\frac{dx_{1}}{dt} = -1 \cdot k_{11} \cdot k_{2} \cdot x_{1} / k_{11}\\
\frac{dx_{2}}{dt} = \left(1 \cdot k_{11} \cdot k_{2} \cdot x_{1} + -1 \cdot k_{11} \cdot k_{2} \cdot x_{2}\right) / k_{11}\\
\frac{dx_{3}}{dt} = \left(1 \cdot k_{11} \cdot k_{2} \cdot x_{2} + -1 \cdot k_{11} \cdot k_{10} \cdot x_{3}\right) / k_{11}\\
\frac{dx_{4}}{dt} = \left(1 \cdot k_{11} \cdot k_{8} + -1 \cdot k_{11} \cdot k_{5} \cdot k_{7}^{k_{8}} / \left(k_{7}^{k_{8}} + x_{5}^{k_{8}}\right) \cdot x_{4} \cdot x_{3}\right) / k_{11}\\
\frac{dx_{5}}{dt} = \left(1 \cdot k_{11} \cdot k_{6} \cdot x_{4} + -1 \cdot k_{11} \cdot k_{6} \cdot x_{5}\right) / k_{11}