\frac{dx_{1}}{dt} = 0\\
\frac{dx_{2}}{dt} = \left(1 \cdot \left(k_{1} \cdot x_{15} - k_{2} \cdot x_{2}\right) + 1 \cdot k_{18} \cdot k_{4} \cdot x_{3} \cdot k_{20}\right) / k_{18}\\
\frac{dx_{3}}{dt} = \left(1 \cdot \left(k_{1} \cdot x_{16} - k_{2} \cdot x_{3}\right) + -1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{3} \cdot x_{8} - k_{7} \cdot x_{7}\right) + -2 \cdot k_{18} \cdot \left(k_{6} \cdot x_{3} \cdot x_{3} - k_{7} \cdot x_{6}\right) + -1 \cdot k_{18} \cdot k_{4} \cdot x_{3} \cdot k_{20} + -1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{3} \cdot x_{5} - k_{7} \cdot x_{9}\right)\right) / k_{18}\\
\frac{dx_{4}}{dt} = \left(1 \cdot k_{18} \cdot k_{4} \cdot x_{5} \cdot k_{20} + 1 \cdot \left(k_{1} \cdot x_{17} - k_{2} \cdot x_{4}\right)\right) / k_{18}\\
\frac{dx_{5}}{dt} = \left(-1 \cdot k_{18} \cdot k_{4} \cdot x_{5} \cdot k_{20} + 1 \cdot \left(k_{1} \cdot x_{18} - k_{2} \cdot x_{5}\right) + -2 \cdot k_{18} \cdot \left(k_{6} \cdot x_{5} \cdot x_{5} - k_{7} \cdot x_{11}\right) + -1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{3} \cdot x_{5} - k_{7} \cdot x_{9}\right) + -1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{5} \cdot x_{8} - k_{7} \cdot x_{10}\right)\right) / k_{18}\\
\frac{dx_{6}}{dt} = \left(1 \cdot k_{5} \cdot x_{12} + 1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{3} \cdot x_{3} - k_{7} \cdot x_{6}\right)\right) / k_{18}\\
\frac{dx_{7}}{dt} = \left(1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{3} \cdot x_{8} - k_{7} \cdot x_{7}\right) + 1 \cdot k_{5} \cdot x_{13}\right) / k_{18}\\
\frac{dx_{8}}{dt} = \left(1 \cdot \left(k_{1} \cdot x_{14} - k_{1} \cdot x_{8}\right) + -1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{3} \cdot x_{8} - k_{7} \cdot x_{7}\right) + -1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{5} \cdot x_{8} - k_{7} \cdot x_{10}\right)\right) / k_{18}\\
\frac{dx_{9}}{dt} = \left(1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{3} \cdot x_{5} - k_{7} \cdot x_{9}\right) + 1 \cdot k_{5} \cdot x_{19}\right) / k_{18}\\
\frac{dx_{10}}{dt} = \left(1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{5} \cdot x_{8} - k_{7} \cdot x_{10}\right) + 1 \cdot k_{5} \cdot x_{20}\right) / k_{18}\\
\frac{dx_{11}}{dt} = \left(1 \cdot k_{18} \cdot \left(k_{6} \cdot x_{5} \cdot x_{5} - k_{7} \cdot x_{11}\right) + 1 \cdot k_{5} \cdot x_{21}\right) / k_{18}\\
\frac{dx_{12}}{dt} = \left(-1 \cdot k_{5} \cdot x_{12} + 1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{16} \cdot x_{16} - k_{7} \cdot x_{12}\right)\right) / k_{19}\\
\frac{dx_{13}}{dt} = \left(1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{16} \cdot x_{14} - k_{7} \cdot x_{13}\right) + -1 \cdot k_{5} \cdot x_{13}\right) / k_{19}\\
\frac{dx_{14}}{dt} = \left(-1 \cdot \left(k_{1} \cdot x_{14} - k_{1} \cdot x_{8}\right) + -1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{16} \cdot x_{14} - k_{7} \cdot x_{13}\right) + -1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{18} \cdot x_{14} - k_{7} \cdot x_{20}\right)\right) / k_{19}\\
\frac{dx_{15}}{dt} = \left(-1 \cdot \left(k_{1} \cdot x_{15} - k_{2} \cdot x_{2}\right) + -1 \cdot k_{19} \cdot k_{3} \cdot x_{23} \cdot x_{15}\right) / k_{19}\\
\frac{dx_{16}}{dt} = \left(-1 \cdot \left(k_{1} \cdot x_{16} - k_{2} \cdot x_{3}\right) + 1 \cdot k_{19} \cdot k_{3} \cdot x_{23} \cdot x_{15} + -1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{16} \cdot x_{14} - k_{7} \cdot x_{13}\right) + -2 \cdot k_{19} \cdot \left(k_{6} \cdot x_{16} \cdot x_{16} - k_{7} \cdot x_{12}\right) + -1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{16} \cdot x_{18} - k_{7} \cdot x_{19}\right)\right) / k_{19}\\
\frac{dx_{17}}{dt} = \left(-1 \cdot k_{19} \cdot k_{3} \cdot x_{17} \cdot x_{23} + -1 \cdot \left(k_{1} \cdot x_{17} - k_{2} \cdot x_{4}\right)\right) / k_{19}\\
\frac{dx_{18}}{dt} = \left(1 \cdot k_{19} \cdot k_{3} \cdot x_{17} \cdot x_{23} + -1 \cdot \left(k_{1} \cdot x_{18} - k_{2} \cdot x_{5}\right) + -2 \cdot k_{19} \cdot \left(k_{6} \cdot x_{18} \cdot x_{18} - k_{7} \cdot x_{21}\right) + -1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{16} \cdot x_{18} - k_{7} \cdot x_{19}\right) + -1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{18} \cdot x_{14} - k_{7} \cdot x_{20}\right)\right) / k_{19}\\
\frac{dx_{19}}{dt} = \left(1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{16} \cdot x_{18} - k_{7} \cdot x_{19}\right) + -1 \cdot k_{5} \cdot x_{19}\right) / k_{19}\\
\frac{dx_{20}}{dt} = \left(1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{18} \cdot x_{14} - k_{7} \cdot x_{20}\right) + -1 \cdot k_{5} \cdot x_{20}\right) / k_{19}\\
\frac{dx_{21}}{dt} = \left(1 \cdot k_{19} \cdot \left(k_{6} \cdot x_{18} \cdot x_{18} - k_{7} \cdot x_{21}\right) + -1 \cdot k_{5} \cdot x_{21}\right) / k_{19}\\
\frac{dx_{22}}{dt} = 0\\
\frac{dx_{23}}{dt} = \left(1 \cdot k_{19} \cdot k_{12} \cdot x_{24} \cdot k_{21} + -1 \cdot k_{19} \cdot \left(k_{10} \cdot x_{23} \cdot x_{26} - k_{11} \cdot x_{25}\right)\right) / k_{19}\\
\frac{dx_{24}}{dt} = -1 \cdot k_{19} \cdot k_{12} \cdot x_{24} \cdot k_{21} / k_{19}\\
\frac{dx_{25}}{dt} = 1 \cdot k_{19} \cdot \left(k_{10} \cdot x_{23} \cdot x_{26} - k_{11} \cdot x_{25}\right) / k_{19}