[ Diff(x[1], t) = ((-1)*k[14]*k[4]*(exp((-k[13])*t)*k[9] + (1 - exp((-k[13])*t))*k[11] + exp((-k[13])*t)*k[10] + (1 - exp((-k[13])*t))*k[12])/2*x[1]*x[3]/x[5] + 1*k[14]*k[2]*x[4])/k[14],
  Diff(x[2], t) = (1*k[14]*k[4]*(exp((-k[13])*t)*k[9] + (1 - exp((-k[13])*t))*k[11] + exp((-k[13])*t)*k[10] + (1 - exp((-k[13])*t))*k[12])/2*x[1]*x[3]/x[5] + (-1)*k[14]*k[3]*x[2])/k[14],
  Diff(x[3], t) = (1*k[14]*k[3]*x[2] + (-1)*k[14]*k[4]*x[3])/k[14],
  Diff(x[4], t) = (1*k[14]*k[4]*x[3] + (-1)*k[14]*k[2]*x[4])/k[14],
  Diff(x[5], t) = 0/k[14] ]