\frac{dx_{1}}{dt} = \left(1 \cdot \left(k_{1} \cdot \left(1 + k_{15} \cdot k_{20} \cdot \left(x_{11} + x_{12}\right)\right) - k_{3} \cdot \left(1 + k_{18} \cdot k_{15}\right) \cdot x_{1}\right) + -2 \cdot \left(k_{7} \cdot x_{1}^{2} \cdot x_{4}^{2} - k_{10} \cdot x_{5}\right) + -2 \cdot \left(k_{8} \cdot x_{1}^{2} \cdot x_{2} - k_{11} \cdot x_{3}\right)\right) / k_{26}\\
\frac{dx_{2}}{dt} = \left(-1 \cdot \left(k_{8} \cdot x_{1}^{2} \cdot x_{2} - k_{11} \cdot x_{3}\right) + -1 \cdot \left(k_{16} \cdot x_{2} \cdot x_{13} - k_{17} \cdot x_{14}\right)\right) / k_{26}\\
\frac{dx_{3}}{dt} = 1 \cdot \left(k_{8} \cdot x_{1}^{2} \cdot x_{2} - k_{11} \cdot x_{3}\right) / k_{26}\\
\frac{dx_{4}}{dt} = \left(-2 \cdot k_{5} \cdot x_{4}^{2} + -2 \cdot \left(k_{7} \cdot x_{1}^{2} \cdot x_{4}^{2} - k_{10} \cdot x_{5}\right) + -1 \cdot k_{9} \cdot x_{4} \cdot x_{7} + 2 \cdot k_{6} \cdot x_{6}\right) / k_{26}\\
\frac{dx_{5}}{dt} = 1 \cdot \left(k_{7} \cdot x_{1}^{2} \cdot x_{4}^{2} - k_{10} \cdot x_{5}\right) / k_{26}\\
\frac{dx_{6}}{dt} = \left(1 \cdot k_{5} \cdot x_{4}^{2} + 1 \cdot k_{12} \cdot x_{8}^{2} + -1 \cdot k_{6} \cdot x_{6}\right) / k_{26}\\
\frac{dx_{7}}{dt} = \left(1 \cdot \left(k_{2} \cdot \left(1 + k_{15} \cdot x_{5}\right) - k_{4} \cdot x_{7}\right) + -1 \cdot k_{9} \cdot x_{4} \cdot x_{7} + 2 \cdot k_{12} \cdot x_{8}^{2}\right) / k_{26}\\
\frac{dx_{8}}{dt} = \left(1 \cdot k_{9} \cdot x_{4} \cdot x_{7} + -2 \cdot k_{12} \cdot x_{8}^{2}\right) / k_{26}\\
\frac{dx_{9}}{dt} = 0 / k_{26}\\
\frac{dx_{10}}{dt} = 0 / k_{26}\\
\frac{dx_{11}}{dt} = 1 \cdot \left(k_{13} \cdot \left(1 + k_{19} \cdot k_{15}\right) - k_{14} \cdot \left(x_{3} / \left(k_{21} + x_{3}\right) + x_{14} / \left(k_{22} + x_{14}\right) - x_{5} / \left(k_{23} + x_{5}\right)\right) \cdot x_{11}\right) / k_{26}\\
\frac{dx_{12}}{dt} = 0 / k_{26}\\
\frac{dx_{13}}{dt} = -1 \cdot \left(k_{16} \cdot x_{2} \cdot x_{13} - k_{17} \cdot x_{14}\right) / k_{26}\\
\frac{dx_{14}}{dt} = 1 \cdot \left(k_{16} \cdot x_{2} \cdot x_{13} - k_{17} \cdot x_{14}\right) / k_{26}