[ Diff(x[1], t) = (1*k[1]*(10*k[2] - x[1])/(1 + k[2] + x[1] + x[2]^2) + (-1)*k[1]*(2*x[1] - x[2])/(1 + x[1] + x[2]))/k[1],
  Diff(x[2], t) = (1*k[1]*(2*x[1] - x[2])/(1 + x[1] + x[2]) + (-1)*k[1]*(x[2] - x[3])/(1 + x[2] + x[3] + x[4]^2) + (-1)*k[1]*(x[2] - x[5])/(1 + x[2] + x[5] + x[6]^2))/k[1],
  Diff(x[3], t) = (1*k[1]*(x[2] - x[3])/(1 + x[2] + x[3] + x[4]^2) + (-1)*k[1]*(5*x[3] - x[4])/(1 + x[3] + x[4]))/k[1],
  Diff(x[4], t) = (1*k[1]*(5*x[3] - x[4])/(1 + x[3] + x[4]) + (-1)*k[1]*(10*x[4] - k[3])/(1 + x[4] + k[3]))/k[1],
  Diff(x[5], t) = (1*k[1]*(x[2] - x[5])/(1 + x[2] + x[5] + x[6]^2) + (-1)*k[1]*(5*x[5] - x[6])/(1 + x[5] + x[6]))/k[1],
  Diff(x[6], t) = (1*k[1]*(5*x[5] - x[6])/(1 + x[5] + x[6]) + (-1)*k[1]*(10*x[6] - k[4])/(1 + x[6] + k[4]))/k[1],
  Diff(x[7], t) = 0,
  Diff(x[8], t) = 0,
  Diff(x[9], t) = 0 ]