[ Diff(x[1], t) = ((-1)*k[8]*x[3]*x[1]*1/(k[9] + x[1])*k[2] + (-1)*k[1]*k[14]*x[6]*1/(k[15] + x[6])*k[3] + (-1)*k[1]*k[16]*x[1]*1/(k[17] + x[1])*k[3])/k[2],
  Diff(x[2], t) = ((-2)*(k[4]*x[2]^2 + (-k[5]*x[4]))*k[2] + 1*k[8]*x[3]*x[1]*1/(k[9] + x[1])*k[2])/k[2],
  Diff(x[4], t) = (1*(k[4]*x[2]^2 + (-k[5]*x[4]))*k[2] + (-1)*k[12]*x[4]*1/(k[13] + x[4])*k[3])/k[2],
  Diff(x[5], t) = (1*(k[10]*x[7]^2 + (-k[11]*x[5]))*k[1] + 1*k[12]*x[4]*1/(k[13] + x[4])*k[3])/k[1],
  Diff(x[6], t) = (1*k[6]*x[8]*x[7]*1/(k[7] + x[7])*k[1] + 1*k[1]*k[14]*x[6]*1/(k[15] + x[6])*k[3] + 1*k[1]*k[16]*x[1]*1/(k[17] + x[1])*k[3])/k[1],
  Diff(x[7], t) = ((-1)*k[6]*x[8]*x[7]*1/(k[7] + x[7])*k[1] + (-2)*(k[10]*x[7]^2 + (-k[11]*x[5]))*k[1])/k[1],
  Diff(x[8], t) = 0/k[1],
  Diff(x[9], t) = 1*k[8]*x[3]*x[1]*1/(k[9] + x[1])*k[2]/k[2] ]