[ Eq(Derivative(x1, t), (-1)*k1*k2*x1/k1),
  Eq(Derivative(x2, t), 1*k1*k2*x1/k1),
  Eq(Derivative(x3, t), (1*k1*k3 + 1*k1*k4*x4 + (-1)*k1*k5*x3)/k1),
  Eq(Derivative(x4, t), (1*k1*k7*x5*x2 + (-1)*k1*k9*x4)/k1),
  Eq(Derivative(x5, t), (1*k1*k6*x3 + (-1)*k1*k7*x5*x2 + (-1)*k1*k8*x5)/k1),
  Eq(Derivative(x6, t), (-1)*k1*k10*x6/k1),
  Eq(Derivative(x7, t), 1*k1*k10*x6/k1),
  Eq(Derivative(x8, t), ((-1)*k1*k11*x8*x9 + (-1)*k1*k12*x8 + 1*k1*k19*x7*x4)/k1),
  Eq(Derivative(x9, t), (1*k1*k17*x10 + (-1)*k1*k18*x9)/k1),
  Eq(Derivative(x10, t), (1*k1*k13 + 1*k1*k14*x7 + (-1)*k1*k15*x10*x4 + (-1)*k1*k16*x10)/k1) ]