[ Eq(Derivative(x8, t), 0/k14),
  Eq(Derivative(x9, t), 0/k14),
  Eq(Derivative(x10, t), 0/k14),
  Eq(Derivative(x1, t), k11*k3*x5*x6 - k12*k4*x1*x6 - k3*x1 - k9*x1*x7**(k13 + 1) + k4*x4 + k10*x4*x7),
  Eq(Derivative(x2, t), k6*x7*x6 - k8*x2 + k9*x1*x7**(k13 + 1) + k10*x4*x7),
  Eq(Derivative(x3, t), k5*x7**k13*x5 - k7*x3 + k9*x1*x7**(k13 + 1)),
  Eq(Derivative(x4, t), k12*k4*x1*x6 - k4*x4 - k10*x4*x7) ]