[ Diff(x[1], t) = (1*k[51]*(k[1]*(1 + k[36]*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[44])^k[38])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[44])^k[38]) + k[2]*x[6])*(1 + 1/10/(3/10)*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41]) + (-1)*k[51]*x[1]*ln(2)/k[3])/k[51],
  Diff(x[2], t) = 1*k[51]*1000000000/602300000000000000000000*k[49]*201/10*3600*x[2]/(k[5] + x[2])/k[51],
  Diff(x[3], t) = (1*k[51]*k[10]*k[6]/(1 + k[9]*x[4]/k[43])*(x[2] + x[8])/(k[7] + x[2] + x[8])*x[12]/(2*(k[11] + x[12])) + (-1)*k[51]*x[3]*ln(2)/k[12])/k[51],
  Diff(x[4], t) = (1*k[51]*(k[13]*(1 + k[36]*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[44])^k[38])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[44])^k[38]) + k[14]*x[3])*(1 + 1/10/(3/10)*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41]) + (-1)*k[51]*x[4]*ln(2)/k[15])/k[51],
  Diff(x[5], t) = (1*k[51]*(k[16]*x[3] + 3600*89/1000000000000*x[6])*(1 + 1/10/(3/10)*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41]) + (-1)*k[51]*x[5]*ln(2)/k[18])/k[51],
  Diff(x[6], t) = 1*k[51]*k[19]*x[5]*(1 + k[36]*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[44])^k[38])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[44])^k[38])/k[51],
  Diff(x[7], t) = (1*k[51]*k[20]*x[6]*(1 + 1/10/(3/10)*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41]) + (-1)*k[51]*x[7]*ln(2)/k[21])/k[51],
  Diff(x[8], t) = 1*k[51]*1000000000/602300000000000000000000*k[49]*201/10*3600*x[7]/(k[5] + x[7])/k[51],
  Diff(x[9], t) = (1*k[51]*(1 + 1/10/(3/10)*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41])*(k[22]*(1 + k[36]*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[44])^k[38])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[44])^k[38]) + k[23]*x[10]/(k[24] + x[10])) + (-1)*k[51]*x[9]*ln(2)/k[25])/k[51],
  Diff(x[10], t) = 1*k[51]*1000000000/602300000000000000000000*k[49]*46*3600*x[9]/(k[27] + x[9])/k[51],
  Diff(x[11], t) = (1*k[51]*(k[28]*(1 + k[36]*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[44])^k[38])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[44])^k[38]) + 3600*1/200000*x[3])*(1 + 1/10/(3/10)*(k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41])/(1 + (k[33]*t^k[34]/(k[35]^k[34] + t^k[34])/k[45])^k[41]) + (-1)*k[51]*x[11]*ln(2)/k[30])/k[51],
  Diff(x[12], t) = (1*k[51]*k[31]*x[11] + (-1)*k[51]*x[12]*ln(2)/k[32])/k[51] ]