[ Eq(Derivative(x7, t), (1*k27*k18*x5 + (-1)*k27*k18*x7)/k27),
  Eq(Derivative(x8, t), (1*k27*k18*x7 + (-1)*k27*k18*x8)/k27),
  Eq(Derivative(x9, t), (1*k27*k18*x8 + (-1)*k27*k18*x9)/k27),
  Eq(Derivative(x10, t), (1*k27*k18*x9 + (-1)*k27*k18*x10)/k27),
  Eq(Derivative(x11, t), (1*k27*k19*x6 + (-1)*k27*k19*x11)/k27),
  Eq(Derivative(x12, t), (1*k27*k19*x11 + (-1)*k27*k19*x12)/k27),
  Eq(Derivative(x13, t), (1*k27*k19*x12 + (-1)*k27*k19*x13)/k27),
  Eq(Derivative(x14, t), (1*k27*k19*x13 + (-1)*k27*k19*x14)/k27),
  Eq(Derivative(x1, t), (1 - x3)*(1 - x4)*k26*x1*(1 - x1/k24) - (1 + x10)*(1 + x14)*k25*x1),
  Eq(Derivative(x2, t), (1 + x10)*(1 + x14)*k25*x1 - k25*x2) ]