\frac{dx_{1}}{dt} = \left(1 \cdot k_{28} \cdot x_{37} \cdot k_{22} + -1 \cdot k_{39} \cdot x_{3} \cdot x_{1} \cdot k_{22} + 1 \cdot k_{64} \cdot x_{23} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{2}}{dt} = \left(-1 \cdot \left(k_{46} \cdot x_{23} \cdot x_{2} + \left(-k_{47} \cdot x_{37}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{48} \cdot x_{2} \cdot x_{9} + \left(-k_{49} \cdot x_{31}\right)\right) \cdot k_{22} + 1 \cdot \operatorname{piecewise}(\left(k_{18} + \left(-x_{2}\right)\right) \cdot 1 / k_{19}, t > k_{17}, 0) \cdot k_{22}\right) / k_{22}\\
\frac{dx_{3}}{dt} = \left(1 \cdot k_{38} \cdot x_{4} \cdot k_{22} + -1 \cdot k_{39} \cdot x_{3} \cdot x_{1} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{4}}{dt} = \left(1 \cdot k_{28} \cdot x_{37} \cdot k_{22} + -1 \cdot k_{38} \cdot x_{4} \cdot k_{22} + -1 \cdot \left(k_{57} \cdot x_{4} \cdot x_{19} + \left(-k_{58} \cdot x_{25}\right)\right) \cdot k_{22} + 1 \cdot k_{64} \cdot x_{23} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{5}}{dt} = \left(1 \cdot k_{31} \cdot \left(x_{31} + x_{37}\right) \cdot k_{22} + -1 \cdot k_{59} \cdot x_{5} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{6}}{dt} = \left(1 \cdot \left(k_{36} \cdot x_{7} \cdot x_{24} + \left(-k_{37} \cdot x_{6}\right)\right) \cdot k_{22} + -1 \cdot k_{65} \cdot x_{6} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{7}}{dt} = \left(-1 \cdot \left(k_{36} \cdot x_{7} \cdot x_{24} + \left(-k_{37} \cdot x_{6}\right)\right) \cdot k_{22} + -1 \cdot \left(\operatorname{piecewise}(1000, t > 1000, 0) \cdot x_{7} \cdot x_{26} + \left(-\operatorname{piecewise}(30000, t > 1000, 0) \cdot x_{27}\right)\right) \cdot k_{22} + 1 \cdot k_{65} \cdot x_{6} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{8}}{dt} = 0\\
\frac{dx_{9}}{dt} = \left(-1 \cdot \left(k_{25} \cdot x_{16} \cdot x_{9} + \left(-k_{26} \cdot x_{17}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{34} \cdot x_{9} \cdot x_{10} + \left(-k_{35} \cdot x_{23}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{44} \cdot x_{13} \cdot \left(x_{37} + x_{9} + x_{31}\right) + \left(-k_{45} \cdot x_{30}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{48} \cdot x_{2} \cdot x_{9} + \left(-k_{49} \cdot x_{31}\right)\right) \cdot k_{22} + 1 \cdot k_{64} \cdot x_{23} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{10}}{dt} = \left(-1 \cdot \left(k_{29} \cdot x_{10} \cdot x_{31} + \left(-k_{30} \cdot x_{37}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{34} \cdot x_{9} \cdot x_{10} + \left(-k_{35} \cdot x_{23}\right)\right) \cdot k_{22} + 1 \cdot k_{39} \cdot x_{3} \cdot x_{1} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{11}}{dt} = \left(1 \cdot \left(k_{32} \cdot x_{14} \cdot x_{24} + \left(-k_{33} \cdot x_{11}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{50} \cdot x_{11} + \left(-k_{51} \cdot x_{12} \cdot x_{13}\right)\right) \cdot k_{22}\right) / k_{22}\\
\frac{dx_{12}}{dt} = 1 \cdot \left(k_{50} \cdot x_{11} + \left(-k_{51} \cdot x_{12} \cdot x_{13}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{13}}{dt} = \left(1 \cdot \left(k_{50} \cdot x_{11} + \left(-k_{51} \cdot x_{12} \cdot x_{13}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{52} \cdot x_{13} \cdot x_{20} + \left(-k_{53} \cdot x_{21}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{60} \cdot x_{32} \cdot x_{13} + \left(-k_{61} \cdot x_{15}\right)\right) \cdot k_{22} + 1 \cdot k_{63} \cdot x_{15} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{14}}{dt} = \left(-1 \cdot \left(k_{32} \cdot x_{14} \cdot x_{24} + \left(-k_{33} \cdot x_{11}\right)\right) \cdot k_{22} + 1 \cdot \left(k_{54} \cdot x_{22} \cdot x_{24} + \left(-k_{55} \cdot x_{14}\right)\right) \cdot k_{22}\right) / k_{22}\\
\frac{dx_{15}}{dt} = \left(1 \cdot \left(k_{60} \cdot x_{32} \cdot x_{13} + \left(-k_{61} \cdot x_{15}\right)\right) \cdot k_{22} + -1 \cdot k_{63} \cdot x_{15} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{16}}{dt} = \left(-1 \cdot \left(k_{25} \cdot x_{16} \cdot x_{9} + \left(-k_{26} \cdot x_{17}\right)\right) \cdot k_{22} + 1 \cdot \operatorname{piecewise}(\left(k_{14} + \left(-x_{16}\right)\right) \cdot 1 / k_{15}, t > k_{13}, 0) \cdot k_{22}\right) / k_{22}\\
\frac{dx_{17}}{dt} = 1 \cdot \left(k_{25} \cdot x_{16} \cdot x_{9} + \left(-k_{26} \cdot x_{17}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{18}}{dt} = 0 / k_{22}\\
\frac{dx_{19}}{dt} = \left(-1 \cdot \left(k_{40} \cdot x_{19} \cdot x_{28} + \left(-k_{41} \cdot x_{29}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{57} \cdot x_{4} \cdot x_{19} + \left(-k_{58} \cdot x_{25}\right)\right) \cdot k_{22}\right) / k_{22}\\
\frac{dx_{20}}{dt} = -1 \cdot \left(k_{52} \cdot x_{13} \cdot x_{20} + \left(-k_{53} \cdot x_{21}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{21}}{dt} = 1 \cdot \left(k_{52} \cdot x_{13} \cdot x_{20} + \left(-k_{53} \cdot x_{21}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{22}}{dt} = -1 \cdot \left(k_{54} \cdot x_{22} \cdot x_{24} + \left(-k_{55} \cdot x_{14}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{23}}{dt} = \left(1 \cdot \left(k_{34} \cdot x_{9} \cdot x_{10} + \left(-k_{35} \cdot x_{23}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{46} \cdot x_{23} \cdot x_{2} + \left(-k_{47} \cdot x_{37}\right)\right) \cdot k_{22} + -1 \cdot k_{64} \cdot x_{23} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{24}}{dt} = \left(1 \cdot k_{1} \cdot x_{25} \cdot k_{66} \cdot 1 / \left(k_{24} + k_{66}\right) \cdot k_{22} + 1 \cdot k_{27} \cdot \left(\operatorname{piecewise}(1, \operatorname{and}\left(t > k_{3}, t < k_{4}\right), 0) + \operatorname{piecewise}(x_{18}, \operatorname{and}\left(t > k_{5}, t < k_{6}\right), 0)\right) \cdot x_{36} \cdot k_{22} + -1 \cdot \left(k_{32} \cdot x_{14} \cdot x_{24} + \left(-k_{33} \cdot x_{11}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{36} \cdot x_{7} \cdot x_{24} + \left(-k_{37} \cdot x_{6}\right)\right) \cdot k_{22} + -1 \cdot \left(k_{54} \cdot x_{22} \cdot x_{24} + \left(-k_{55} \cdot x_{14}\right)\right) \cdot k_{22} + 1 \cdot k_{8} \cdot x_{29} \cdot k_{66} \cdot 1 / \left(k_{56} + k_{66}\right) \cdot k_{22}\right) / k_{22}\\
\frac{dx_{25}}{dt} = 1 \cdot \left(k_{57} \cdot x_{4} \cdot x_{19} + \left(-k_{58} \cdot x_{25}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{26}}{dt} = -1 \cdot \left(\operatorname{piecewise}(1000, t > 1000, 0) \cdot x_{7} \cdot x_{26} + \left(-\operatorname{piecewise}(30000, t > 1000, 0) \cdot x_{27}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{27}}{dt} = 1 \cdot \left(\operatorname{piecewise}(1000, t > 1000, 0) \cdot x_{7} \cdot x_{26} + \left(-\operatorname{piecewise}(30000, t > 1000, 0) \cdot x_{27}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{28}}{dt} = -1 \cdot \left(k_{40} \cdot x_{19} \cdot x_{28} + \left(-k_{41} \cdot x_{29}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{29}}{dt} = 1 \cdot \left(k_{40} \cdot x_{19} \cdot x_{28} + \left(-k_{41} \cdot x_{29}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{30}}{dt} = 1 \cdot \left(k_{44} \cdot x_{13} \cdot \left(x_{37} + x_{9} + x_{31}\right) + \left(-k_{45} \cdot x_{30}\right)\right) \cdot k_{22} / k_{22}\\
\frac{dx_{31}}{dt} = \left(1 \cdot k_{28} \cdot x_{37} \cdot k_{22} + -1 \cdot \left(k_{29} \cdot x_{10} \cdot x_{31} + \left(-k_{30} \cdot x_{37}\right)\right) \cdot k_{22} + -1 \cdot k_{31} \cdot \left(x_{31} + x_{37}\right) \cdot k_{22} + 1 \cdot \left(k_{48} \cdot x_{2} \cdot x_{9} + \left(-k_{49} \cdot x_{31}\right)\right) \cdot k_{22} + 1 \cdot k_{59} \cdot x_{5} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{32}}{dt} = \left(-1 \cdot \left(k_{60} \cdot x_{32} \cdot x_{13} + \left(-k_{61} \cdot x_{15}\right)\right) \cdot k_{22} + 1 \cdot k_{62} \cdot x_{35} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{33}}{dt} = \left(-1 \cdot \left(k_{42} \cdot x_{34} \cdot x_{33} + \left(-k_{43} \cdot x_{35}\right)\right) \cdot k_{22} + 1 \cdot k_{63} \cdot x_{15} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{34}}{dt} = \left(-1 \cdot \left(k_{42} \cdot x_{34} \cdot x_{33} + \left(-k_{43} \cdot x_{35}\right)\right) \cdot k_{22} + 1 \cdot k_{62} \cdot x_{35} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{35}}{dt} = \left(1 \cdot \left(k_{42} \cdot x_{34} \cdot x_{33} + \left(-k_{43} \cdot x_{35}\right)\right) \cdot k_{22} + -1 \cdot k_{62} \cdot x_{35} \cdot k_{22}\right) / k_{22}\\
\frac{dx_{36}}{dt} = -1 \cdot k_{27} \cdot \left(\operatorname{piecewise}(1, \operatorname{and}\left(t > k_{3}, t < k_{4}\right), 0) + \operatorname{piecewise}(x_{18}, \operatorname{and}\left(t > k_{5}, t < k_{6}\right), 0)\right) \cdot x_{36} \cdot k_{22} / k_{22}\\
\frac{dx_{37}}{dt} = \left(-1 \cdot k_{28} \cdot x_{37} \cdot k_{22} + 1 \cdot \left(k_{29} \cdot x_{10} \cdot x_{31} + \left(-k_{30} \cdot x_{37}\right)\right) \cdot k_{22} + 1 \cdot \left(k_{46} \cdot x_{23} \cdot x_{2} + \left(-k_{47} \cdot x_{37}\right)\right) \cdot k_{22}\right) / k_{22}