\frac{dx_{1}}{dt} = \left(1 \cdot k_{10} \cdot k_{1} / \left(1 + x_{2}^{k_{3}}\right) + -1 \cdot k_{10} \cdot k_{11} \cdot x_{1}\right) / k_{10}\\ \frac{dx_{2}}{dt} = \left(1 \cdot k_{10} \cdot k_{2} / \left(1 + x_{1} / 1 + x_{3} / k_{8}^{k_{9}}^{k_{4}}\right) + -1 \cdot k_{10} \cdot k_{12} \cdot x_{2}\right) / k_{10}\\ \frac{dx_{3}}{dt} = 0 / k_{10}