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