\frac{dx_{1}}{dt} = \left(-1 \cdot k_{11} \cdot k_{1} \cdot x_{5} \cdot x_{1} + -1 \cdot k_{11} \cdot \left(k_{2} \cdot x_{6} \cdot x_{1} - k_{3} \cdot x_{4}\right)\right) / k_{11}\\
\frac{dx_{2}}{dt} = \left(1 \cdot k_{11} \cdot k_{1} \cdot x_{5} \cdot x_{1} + -1 \cdot k_{11} \cdot \left(k_{5} \cdot x_{2} + k_{2} \cdot x_{6} \cdot x_{2}\right) + -1 \cdot k_{11} \cdot k_{4} \cdot x_{2}\right) / k_{11}\\
\frac{dx_{3}}{dt} = \left(1 \cdot k_{11} \cdot \left(k_{5} \cdot x_{2} + k_{2} \cdot x_{6} \cdot x_{2}\right) + -1 \cdot k_{11} \cdot k_{4} \cdot x_{3}\right) / k_{11}\\
\frac{dx_{4}}{dt} = 1 \cdot k_{11} \cdot \left(k_{2} \cdot x_{6} \cdot x_{1} - k_{3} \cdot x_{4}\right) / k_{11}\\
\frac{dx_{5}}{dt} = \left(1 \cdot k_{11} \cdot \left(k_{6} \cdot x_{2} + \left(1 - k_{7}\right) \cdot k_{6} \cdot x_{3}\right) + -1 \cdot k_{11} \cdot k_{8} \cdot x_{5}\right) / k_{11}\\
\frac{dx_{6}}{dt} = \left(1 \cdot k_{11} \cdot k_{9} \cdot k_{6} \cdot \left(x_{2} + x_{3}\right) + -1 \cdot k_{11} \cdot k_{8} \cdot x_{6}\right) / k_{11}