[ Eq(Derivative(x1, t), 0),
  Eq(Derivative(x2, t), (-1)*k17*(k1*k18*x2 - k2*x3)/k17),
  Eq(Derivative(x3, t), (1*k17*(k1*k18*x2 - k2*x3) + (-1)*k3*k17*x3)/k17),
  Eq(Derivative(x4, t), (1*k3*k17*x3 + (-1)*k17*(k4*x4 - k5*x5))/k17),
  Eq(Derivative(x5, t), 1*k17*(k4*x4 - k5*x5)/k17),
  Eq(Derivative(x6, t), (-1)*k17*(k6*k18*x6 - k7*x7)/k17),
  Eq(Derivative(x7, t), (1*k17*(k6*k18*x6 - k7*x7) + (-1)*k8*k17*x7)/k17),
  Eq(Derivative(x8, t), (1*k8*k17*x7 + (-1)*k17*(k9*k18*x8 - k10*x9))/k17),
  Eq(Derivative(x9, t), (1*k17*(k9*k18*x8 - k10*x9) + (-1)*k17*(k11*x9 - k12*x10))/k17),
  Eq(Derivative(x10, t), 1*k17*(k11*x9 - k12*x10)/k17) ]