\frac{dx_{1}}{dt} = \left(1 \cdot k_{33} \cdot k_{21} + 1 \cdot k_{33} \cdot k_{22} \cdot x_{1} + -1 \cdot k_{33} \cdot k_{23} \cdot x_{2} / \left(k_{2} + x_{2}\right) \cdot x_{1} + -1 \cdot k_{33} \cdot k_{24} \cdot x_{7} / \left(k_{4} + x_{7}\right) \cdot x_{5} / \left(k_{5} + x_{5}\right) \cdot x_{1}\right) / k_{33}\\
\frac{dx_{2}}{dt} = \left(1 \cdot k_{33} \cdot k_{25} \cdot x_{1}^{k_{7}} / \left(k_{8}^{k_{7}} + x_{1}^{k_{7}}\right) \cdot x_{7}^{k_{10}} / \left(k_{4}^{k_{10}} + x_{7}^{k_{10}}\right) \cdot x_{6} + -1 \cdot k_{33} \cdot k_{26} \cdot x_{2}\right) / k_{33}\\
\frac{dx_{3}}{dt} = \left(1 \cdot k_{33} \cdot k_{27} \cdot x_{2} + -1 \cdot k_{33} \cdot k_{28} \cdot x_{3}\right) / k_{33}\\
\frac{dx_{4}}{dt} = \frac{-1}{1000} \cdot k_{34} \cdot \left(k_{29} \cdot x_{3}^{3} / \left(k_{12}^{3} + x_{3}^{3}\right) \cdot x_{4}^{k_{18}} / \left(k_{19}^{k_{18}} + x_{4}^{k_{18}}\right) - k_{30} \cdot x_{5} / \left(k_{14} + x_{5}\right)\right) / k_{34}\\
\frac{dx_{5}}{dt} = \left(\frac{1}{100} \cdot k_{34} \cdot \left(k_{29} \cdot x_{3}^{3} / \left(k_{12}^{3} + x_{3}^{3}\right) \cdot x_{4}^{k_{18}} / \left(k_{19}^{k_{18}} + x_{4}^{k_{18}}\right) - k_{30} \cdot x_{5} / \left(k_{14} + x_{5}\right)\right) + \frac{-1}{20} \cdot k_{33} \cdot k_{31} \cdot x_{5} / \left(k_{16} + x_{5}\right) + \frac{1}{20} \cdot k_{33} \cdot k_{32}\right) / k_{33}