\frac{dx_{1}}{dt} = \left(1 \cdot k_{33} \cdot k_{1} / \left(1 + x_{2} / k_{2}\right) + 1 \cdot k_{33} \cdot \left(k_{3} + k_{4} \cdot x_{8} / \left(1 + x_{7} / k_{5}\right) \cdot x_{3} / \left(k_{6} + x_{3}\right)\right) + -1 \cdot k_{33} \cdot \left(k_{7} + k_{8} \cdot x_{2}\right) \cdot x_{1} + 1 \cdot k_{33} \cdot k_{31} \cdot k_{38}\right) / k_{33}\\ \frac{dx_{2}}{dt} = \left(1 \cdot k_{33} \cdot \left(k_{24} - k_{25} \cdot x_{15}\right) + -1 \cdot k_{33} \cdot k_{26} \cdot x_{2}\right) / k_{33}\\ \frac{dx_{3}}{dt} = \left(1 \cdot k_{33} \cdot k_{14} \cdot x_{9} + -1 \cdot k_{33} \cdot k_{15} \cdot x_{3}\right) / k_{33}\\ \frac{dx_{5}}{dt} = \left(1 \cdot k_{33} \cdot k_{9} \cdot x_{1} \cdot x_{4} + -1 \cdot k_{33} \cdot k_{10} \cdot x_{5}\right) / k_{33}\\ \frac{dx_{6}}{dt} = 0\\ \frac{dx_{7}}{dt} = \left(1 \cdot k_{33} \cdot k_{27} / \left(1 + x_{1} / k_{28}\right) + -1 \cdot k_{33} \cdot k_{29} \cdot x_{7} + 1 \cdot k_{33} \cdot k_{32} \cdot k_{40}\right) / k_{33}\\ \frac{dx_{8}}{dt} = \left(1 \cdot k_{33} \cdot \left(k_{19} + k_{20} \cdot x_{1} \cdot x_{7}\right) + -1 \cdot k_{33} \cdot k_{21} \cdot x_{8} + 1 \cdot k_{33} \cdot k_{30} \cdot k_{39}\right) / k_{33}\\ \frac{dx_{9}}{dt} = \left(1 \cdot k_{33} \cdot k_{11} \cdot x_{5} / \left(1 + x_{8} / k_{12}\right) + -1 \cdot k_{33} \cdot k_{13} \cdot x_{9}\right) / k_{33}\\ \frac{dx_{11}}{dt} = 0\\ \frac{dx_{12}}{dt} = \left(1 \cdot k_{33} \cdot \left(k_{16} + k_{17} \cdot x_{3}\right) \cdot x_{10} + -1 \cdot k_{33} \cdot k_{18} \cdot x_{12} \cdot x_{8}\right) / k_{33}\\ \frac{dx_{14}}{dt} = 0\\ \frac{dx_{15}}{dt} = \left(1 \cdot k_{33} \cdot k_{22} \cdot x_{12} \cdot x_{13} + -1 \cdot k_{33} \cdot k_{23} \cdot x_{15}\right) / k_{33}\\ \frac{dx_{16}}{dt} = 0\\ \frac{dx_{17}}{dt} = 0\\ \frac{dx_{18}}{dt} = 0