\frac{dx_{1}}{dt} = \left(-1 \cdot k_{39} \cdot k_{1} \cdot x_{1} / \left(k_{2} + x_{1}\right) + 1 \cdot k_{39} \cdot k_{3} \cdot x_{2} / \left(k_{4} + x_{2}\right)\right) / k_{39}\\
\frac{dx_{2}}{dt} = \left(1 \cdot k_{39} \cdot k_{1} \cdot x_{1} / \left(k_{2} + x_{1}\right) + -1 \cdot k_{39} \cdot k_{3} \cdot x_{2} / \left(k_{4} + x_{2}\right)\right) / k_{39}\\
\frac{dx_{3}}{dt} = \left(-1 \cdot k_{39} \cdot k_{5} \cdot x_{3} \cdot x_{2} / \left(k_{6} + x_{3}\right) + 1 \cdot k_{39} \cdot k_{7} \cdot x_{4} / \left(k_{8} + x_{4}\right) + -1 \cdot k_{39} \cdot k_{33} \cdot x_{3} \cdot x_{9} / \left(k_{34} + x_{3}\right) + 1 \cdot k_{39} \cdot k_{35} \cdot x_{5} / \left(k_{36} + x_{5}\right)\right) / k_{39}\\
\frac{dx_{4}}{dt} = \left(1 \cdot k_{39} \cdot k_{5} \cdot x_{3} \cdot x_{2} / \left(k_{6} + x_{3}\right) + -1 \cdot k_{39} \cdot k_{7} \cdot x_{4} / \left(k_{8} + x_{4}\right)\right) / k_{39}\\
\frac{dx_{5}}{dt} = \left(1 \cdot k_{39} \cdot k_{33} \cdot x_{3} \cdot x_{9} / \left(k_{34} + x_{3}\right) + -1 \cdot k_{39} \cdot k_{35} \cdot x_{5} / \left(k_{36} + x_{5}\right)\right) / k_{39}\\
\frac{dx_{6}}{dt} = \left(-1 \cdot k_{39} \cdot \left(k_{9} \cdot x_{4} \cdot x_{6} / \left(k_{10} + x_{6}\right) + k_{11} \cdot x_{11} \cdot x_{6} / \left(k_{12} + x_{6}\right)\right) + 1 \cdot k_{39} \cdot k_{13} \cdot x_{7} / \left(k_{14} + x_{7}\right)\right) / k_{39}\\
\frac{dx_{7}}{dt} = \left(1 \cdot k_{39} \cdot \left(k_{9} \cdot x_{4} \cdot x_{6} / \left(k_{10} + x_{6}\right) + k_{11} \cdot x_{11} \cdot x_{6} / \left(k_{12} + x_{6}\right)\right) + -1 \cdot k_{39} \cdot k_{13} \cdot x_{7} / \left(k_{14} + x_{7}\right)\right) / k_{39}\\
\frac{dx_{8}}{dt} = \left(-1 \cdot k_{39} \cdot k_{15} \cdot x_{8} \cdot x_{7} / \left(k_{16} + x_{8}\right) + 1 \cdot k_{39} \cdot k_{17} \cdot x_{9} / \left(k_{18} + x_{9}\right) + -1 \cdot k_{39} \cdot \left(k_{29} \cdot x_{8} \cdot x_{15} - k_{30} \cdot x_{13}\right)\right) / k_{39}\\
\frac{dx_{9}}{dt} = \left(1 \cdot k_{39} \cdot k_{15} \cdot x_{8} \cdot x_{7} / \left(k_{16} + x_{8}\right) + -1 \cdot k_{39} \cdot k_{17} \cdot x_{9} / \left(k_{18} + x_{9}\right)\right) / k_{39}\\
\frac{dx_{10}}{dt} = \left(-1 \cdot k_{39} \cdot k_{19} \cdot x_{10} \cdot x_{2} / \left(k_{20} + x_{10}\right) + 1 \cdot k_{39} \cdot k_{21} \cdot x_{11} / \left(k_{22} + x_{11}\right) + -1 \cdot k_{39} \cdot \left(k_{31} \cdot x_{10} \cdot x_{15} - k_{32} \cdot x_{14}\right)\right) / k_{39}\\
\frac{dx_{11}}{dt} = \left(1 \cdot k_{39} \cdot k_{19} \cdot x_{10} \cdot x_{2} / \left(k_{20} + x_{10}\right) + -1 \cdot k_{39} \cdot k_{21} \cdot x_{11} / \left(k_{22} + x_{11}\right)\right) / k_{39}\\
\frac{dx_{12}}{dt} = 0 / k_{39}\\
\frac{dx_{13}}{dt} = 1 \cdot k_{39} \cdot \left(k_{29} \cdot x_{8} \cdot x_{15} - k_{30} \cdot x_{13}\right) / k_{39}\\
\frac{dx_{14}}{dt} = 1 \cdot k_{39} \cdot \left(k_{31} \cdot x_{10} \cdot x_{15} - k_{32} \cdot x_{14}\right) / k_{39}\\
\frac{dx_{15}}{dt} = \left(-1 \cdot k_{39} \cdot \left(k_{23} \cdot x_{9} \cdot x_{15} / \left(k_{24} + x_{16}\right) + k_{25} \cdot x_{11} \cdot x_{15} / \left(k_{26} + x_{15}\right)\right) + 1 \cdot k_{39} \cdot k_{27} \cdot x_{16} / \left(k_{28} + x_{16}\right) + -1 \cdot k_{39} \cdot \left(k_{29} \cdot x_{8} \cdot x_{15} - k_{30} \cdot x_{13}\right) + -1 \cdot k_{39} \cdot \left(k_{31} \cdot x_{10} \cdot x_{15} - k_{32} \cdot x_{14}\right) + 1 \cdot k_{39} \cdot k_{37}\right) / k_{39}\\
\frac{dx_{16}}{dt} = \left(1 \cdot k_{39} \cdot \left(k_{23} \cdot x_{9} \cdot x_{15} / \left(k_{24} + x_{16}\right) + k_{25} \cdot x_{11} \cdot x_{15} / \left(k_{26} + x_{15}\right)\right) + -1 \cdot k_{39} \cdot k_{27} \cdot x_{16} / \left(k_{28} + x_{16}\right) + -1 \cdot k_{39} \cdot k_{38} \cdot x_{16}\right) / k_{39}