{ diff(x1, t) = ((-1)*k3*x1/k4*k47/k5/(k6/k4 + x1/k4 + k47/k5 + x1*k47/(k4*k5)) + 1*k7*k46/(k8 + k46)*x4/(k9 + x4))/k39,
  diff(x2, t) = ((-1)*(k45*k1*x2 - k2*x4) + 1*k3*x1/k4*k47/k5/(k6/k4 + x1/k4 + k47/k5 + x1*k47/(k4*k5)) + 1*k10*x6/(k11 + x6) + (-1)*k12*k45/(k13 + k45)*x2/(k14 + x2) + 1*k15*k44/(k16 + k44)*x6/(k17 + x6) + 1*k18*k43/(k19 + k43)*x6/(k20 + x6) + 1*k24*k46/(k25 + k46)*x3/(k26 + x3) + (-1)*(k31*k40/(k32 + k40)*x2/(k33 + x2) - k34*k41/(k32 + k41)*x4/(k33 + x4)))/k39,
  diff(x3, t) = (1*k21*k42/(k22 + k42)*x4/(k23 + x4) + (-1)*k24*k46/(k25 + k46)*x3/(k26 + x3))/k39,
  diff(x4, t) = (1*(k45*k1*x2 - k2*x4) + (-1)*k7*k46/(k8 + k46)*x4/(k9 + x4) + (-1)*k21*k42/(k22 + k42)*x4/(k23 + x4) + 1*(k31*k40/(k32 + k40)*x2/(k33 + x2) - k34*k41/(k32 + k41)*x4/(k33 + x4)) + (-1)*(k35*x4/(k36 + x4) - k37*x5/(k38 + x5)))/k39,
  diff(x5, t) = ((-1)*(k27*x5/(k28 + x5) - k29*x6/(k30 + x6)) + 1*(k35*x4/(k36 + x4) - k37*x5/(k38 + x5)))/k39,
  diff(x6, t) = ((-1)*k10*x6/(k11 + x6) + 1*k12*k45/(k13 + k45)*x2/(k14 + x2) + (-1)*k15*k44/(k16 + k44)*x6/(k17 + x6) + (-1)*k18*k43/(k19 + k43)*x6/(k20 + x6) + 1*(k27*x5/(k28 + x5) - k29*x6/(k30 + x6)))/k39,
  diff(x7, t) = 0,
  diff(x8, t) = 0,
  diff(x9, t) = 0,
  diff(x10, t) = 0,
  diff(x11, t) = 0,
  diff(x12, t) = 0,
  diff(x13, t) = 0,
  diff(x14, t) = 0 }