[ Diff(x[1], t) = ((-1)*k[33]*x[12]*x[1]*k[26] + 1*(k[12]*166112956810631/100000000000000000*x[2]*x[6] + (-k[12]*k[13]*x[1]))*k[26])/k[26],
  Diff(x[2], t) = (1*k[33]*x[12]*x[1]*k[26] + (-1)*(k[12]*166112956810631/100000000000000000*x[2]*x[6] + (-k[12]*k[13]*x[1]))*k[26] + (-1)*k[27]*(k[22]*166112956810631/100000000000000000*x[13]*166112956810631/100000000000000000*x[2] + (-k[22]*k[23]*166112956810631/100000000000000000*x[5]))*1*1/k[1])/k[27],
  Diff(x[3], t) = (-1)*k[26]*(piecewise(x[7] < k[2], 581/1000*k[3]*((-1) + exp((k[2] + (-x[7]))*1/k[2])), 0) + piecewise(t > k[5], k[4]*exp(-(t + (-k[5]))*1/k[6]), 0))*x[3]/k[26],
  Diff(x[4], t) = 0,
  Diff(x[5], t) = 1*k[27]*(k[22]*166112956810631/100000000000000000*x[13]*166112956810631/100000000000000000*x[2] + (-k[22]*k[23]*166112956810631/100000000000000000*x[5]))*1*1/k[1]/k[27],
  Diff(x[6], t) = ((-1)*k[30]*x[6]*x[12]*k[26] + (-1)*(k[12]*166112956810631/100000000000000000*x[2]*x[6] + (-k[12]*k[13]*x[1]))*k[26] + 1*k[26]*(piecewise(x[6] < k[18], 581/1000*k[19]*((-1) + exp((k[18] + (-x[6]))*1/k[18])), 0) + piecewise(t > k[16], k[15]*exp(-(t + (-k[16]))*1/k[17]), 0))*x[7])/k[26],
  Diff(x[7], t) = (1*k[26]*(piecewise(x[7] < k[2], 581/1000*k[3]*((-1) + exp((k[2] + (-x[7]))*1/k[2])), 0) + piecewise(t > k[5], k[4]*exp(-(t + (-k[5]))*1/k[6]), 0))*x[3] + (-1)*k[26]*(piecewise(x[6] < k[18], 581/1000*k[19]*((-1) + exp((k[18] + (-x[6]))*1/k[18])), 0) + piecewise(t > k[16], k[15]*exp(-(t + (-k[16]))*1/k[17]), 0))*x[7])/k[26],
  Diff(x[8], t) = (1*k[30]*x[6]*x[12]*k[26] + 1*k[33]*x[12]*x[1]*k[26])/k[26],
  Diff(x[9], t) = 0,
  Diff(x[10], t) = 0,
  Diff(x[11], t) = (-1)*k[26]*(k[31]*x[11]*k[36]*piecewise(t > k[9], exp(-(t + (-k[9]))*1/k[10]), 0) + (-k[32]*x[12]))/k[26],
  Diff(x[12], t) = 1*k[26]*(k[31]*x[11]*k[36]*piecewise(t > k[9], exp(-(t + (-k[9]))*1/k[10]), 0) + (-k[32]*x[12]))/k[26],
  Diff(x[13], t) = (1*k[30]*x[6]*x[12]*k[26] + 1*k[33]*x[12]*x[1]*k[26] + (-1)*k[27]*k[35]*(166112956810631/100000000000000000*x[13] + (-k[34]))*1*1/k[1] + (-1)*k[27]*(k[22]*166112956810631/100000000000000000*x[13]*166112956810631/100000000000000000*x[2] + (-k[22]*k[23]*166112956810631/100000000000000000*x[5]))*1*1/k[1])/k[27] ]