\frac{dx_{1}}{dt} = \left(1 \cdot k_{66} \cdot \lceil \sin\left(\pi \cdot t / k_{65} + \frac{1}{1000}\right) / 2 \rceil \cdot k_{1} \cdot x_{13} + 1 \cdot k_{66} \cdot k_{2} \cdot x_{9}^{k_{3}} / \left(k_{4}^{k_{3}} + x_{9}^{k_{3}}\right) + -1 \cdot k_{66} \cdot k_{5} \cdot x_{1} / \left(k_{6} + x_{1}\right)\right) / k_{66}\\
\frac{dx_{2}}{dt} = \left(1 \cdot k_{66} \cdot k_{7} \cdot x_{1} + 1 \cdot k_{66} \cdot k_{9} \cdot x_{3} + -1 \cdot k_{66} \cdot k_{10} \cdot x_{2} / \left(k_{11} + x_{2}\right) + -1 \cdot k_{66} \cdot k_{8} \cdot x_{2}\right) / k_{66}\\
\frac{dx_{3}}{dt} = \left(-1 \cdot k_{66} \cdot k_{9} \cdot x_{3} + 1 \cdot k_{66} \cdot k_{8} \cdot x_{2} + -1 \cdot k_{66} \cdot k_{12} \cdot x_{3} / \left(k_{13} + x_{3}\right)\right) / k_{66}\\
\frac{dx_{4}}{dt} = \left(1 \cdot k_{66} \cdot k_{14} \cdot x_{12}^{k_{15}} / \left(k_{16}^{k_{15}} + x_{12}^{k_{15}}\right) \cdot k_{17}^{k_{18}} / \left(k_{17}^{k_{18}} + x_{3}^{k_{18}}\right) + -1 \cdot k_{66} \cdot k_{19} \cdot x_{4} / \left(k_{20} + x_{4}\right)\right) / k_{66}\\
\frac{dx_{5}}{dt} = \left(1 \cdot k_{66} \cdot k_{21} \cdot x_{4} + 1 \cdot k_{66} \cdot k_{23} \cdot x_{6} + -1 \cdot k_{66} \cdot \left(\left(1 - \lceil \sin\left(\pi \cdot t / k_{65} + \frac{1}{1000}\right) / 2 \rceil\right) \cdot k_{24} + k_{25}\right) \cdot x_{5} / \left(k_{26} + x_{5}\right) + -1 \cdot k_{66} \cdot k_{22} \cdot x_{5}\right) / k_{66}\\
\frac{dx_{6}}{dt} = \left(-1 \cdot k_{66} \cdot k_{23} \cdot x_{6} + 1 \cdot k_{66} \cdot k_{22} \cdot x_{5} + -1 \cdot k_{66} \cdot \left(\left(1 - \lceil \sin\left(\pi \cdot t / k_{65} + \frac{1}{1000}\right) / 2 \rceil\right) \cdot k_{27} + k_{28}\right) \cdot x_{6} / \left(k_{29} + x_{6}\right)\right) / k_{66}\\
\frac{dx_{7}}{dt} = \left(1 \cdot k_{66} \cdot k_{30} \cdot x_{6}^{k_{31}} / \left(k_{32}^{k_{31}} + x_{6}^{k_{31}}\right) + -1 \cdot k_{66} \cdot k_{33} \cdot x_{7} / \left(k_{34} + x_{7}\right)\right) / k_{66}\\
\frac{dx_{8}}{dt} = \left(1 \cdot k_{66} \cdot k_{35} \cdot x_{7} + 1 \cdot k_{66} \cdot k_{37} \cdot x_{9} + -1 \cdot k_{66} \cdot k_{38} \cdot x_{8} / \left(k_{39} + x_{8}\right) + -1 \cdot k_{66} \cdot k_{36} \cdot x_{8}\right) / k_{66}\\
\frac{dx_{9}}{dt} = \left(-1 \cdot k_{66} \cdot k_{37} \cdot x_{9} + 1 \cdot k_{66} \cdot k_{36} \cdot x_{8} + -1 \cdot k_{66} \cdot k_{40} \cdot x_{9} / \left(k_{41} + x_{9}\right)\right) / k_{66}\\
\frac{dx_{10}}{dt} = \left(1 \cdot k_{66} \cdot \left(\lceil \sin\left(\pi \cdot t / k_{65} + \frac{1}{1000}\right) / 2 \rceil \cdot k_{42} \cdot x_{13} + \left(\lceil \sin\left(\pi \cdot t / k_{65} + \frac{1}{1000}\right) / 2 \rceil \cdot k_{43} + k_{44}\right) \cdot k_{45}^{k_{48}} / \left(k_{45}^{k_{48}} + x_{6}^{k_{48}}\right)\right) \cdot k_{46}^{k_{47}} / \left(k_{46}^{k_{47}} + x_{3}^{k_{47}}\right) + -1 \cdot k_{66} \cdot k_{49} \cdot x_{10} / \left(k_{50} + x_{10}\right)\right) / k_{66}\\
\frac{dx_{11}}{dt} = \left(1 \cdot k_{66} \cdot k_{51} \cdot x_{10} + 1 \cdot k_{66} \cdot k_{53} \cdot x_{12} + -1 \cdot k_{66} \cdot k_{54} \cdot x_{11} / \left(k_{55} + x_{11}\right) + -1 \cdot k_{66} \cdot k_{52} \cdot x_{11}\right) / k_{66}\\
\frac{dx_{12}}{dt} = \left(-1 \cdot k_{66} \cdot k_{53} \cdot x_{12} + 1 \cdot k_{66} \cdot k_{52} \cdot x_{11} + -1 \cdot k_{66} \cdot k_{56} \cdot x_{12} / \left(k_{57} + x_{12}\right)\right) / k_{66}\\
\frac{dx_{13}}{dt} = \left(1 \cdot k_{66} \cdot \left(1 - \lceil \sin\left(\pi \cdot t / k_{65} + \frac{1}{1000}\right) / 2 \rceil\right) \cdot k_{58} + -1 \cdot k_{66} \cdot k_{61} \cdot x_{13} / \left(k_{59} + x_{13}\right) + -1 \cdot k_{66} \cdot k_{60} \cdot \lceil \sin\left(\pi \cdot t / k_{65} + \frac{1}{1000}\right) / 2 \rceil \cdot x_{13}\right) / k_{66}