[ Eq(Derivative(x11, t), 0/k70),
  Eq(Derivative(x1, t), k12*k8 - k10*x1),
  Eq(Derivative(x2, t), k14*k9*1/(1 + (x12/k50)**k67) - k11*x2),
  Eq(Derivative(x3, t), k16*(k61 + (x1/k45)**k64)/(1 + (x1/k45)**k64 + (x10/k49)**k69) - k23*x3),
  Eq(Derivative(x4, t), k30*x3 - k38*x4),
  Eq(Derivative(x5, t), k17*(k63 + (x1/k45)**k64)/(1 + (x1/k45)**k64) - k24*x5),
  Eq(Derivative(x6, t), k31*x5 - k39*x6),
  Eq(Derivative(x7, t), k18*(k62 + (x2/k46)**k65)/(1 + (x2/k46)**k65 + (x4/k47)**k68) - k25*x7),
  Eq(Derivative(x8, t), k32*x7 - k40*x8),
  Eq(Derivative(x9, t), k51 - k52*x9 - k55*x9*x16),
  Eq(Derivative(x10, t), k29*x9 - k37*x10),
  Eq(Derivative(x12, t), k36*x11 - k44*x12),
  Eq(Derivative(x13, t), k20*k58 - k27*x13),
  Eq(Derivative(x14, t), k19*(k59 + (x8/k48)**k66)/(1 + (x8/k48)**k66) - k26*x14),
  Eq(Derivative(x15, t), k21*(k60 + (x8/k48)**k66)/(1 + (x8/k48)**k66) - k28*x15),
  Eq(Derivative(x16, t), 0) ]