{ diff(x1, t) = (1*k55*k2*x7*k1*(1 + x20/k47 + x12/k48 + x5/k49 + x3/k50)/(k1 + k3*(1 + x1/k54)) + (-1)*k55*k4*x8*x1/(x1 + k5*(1 + x12/k54)) + (-1)*k55*k6*x9*x1/(x1 + k7*(1 + x20/k46 + x19/k44 + x20/k54)) + (-1)*k55*k8*x10*x1/(x1 + k9*(1 + x23/k32 + x22/k54)) + (-1)*k55*k14*x14*x1/(x1 + k15*(1 + x21/k36 + x19/k37 + x23/k40 + x3/k41 + x2/k54)) + (-1)*1/10*x1*k55)/k55,
  diff(x2, t) = (1*k55*k14*x14*x1/(x1 + k15*(1 + x21/k36 + x19/k37 + x23/k40 + x3/k41 + x2/k54)) + (-1)*k55*k20*x17*x2/(x2 + k21*(1 + x3/k54)) + (-1)*k55*k14*x14*x2/(x2 + k15*(1 + x21/k36 + x19/k37 + x23/k40 + x3/k41 + x4/k54)))/k55,
  diff(x3, t) = (1*k55*k20*x17*x2/(x2 + k21*(1 + x3/k54)) + (-1)*k26*x3*k55)/k55,
  diff(x4, t) = (1*k55*k14*x14*x2/(x2 + k15*(1 + x21/k36 + x19/k37 + x23/k40 + x3/k41 + x4/k54)) + (-1)*k55*k16*x15*x4/(x4 + k17*(1 + x5/k54)) + (-1)*k55*x4*k27)/k55,
  diff(x5, t) = (1*k55*k16*x15*x4/(x4 + k17*(1 + x5/k54)) + (-1)*k55*k18*x16*x5/(x5 + k19*(1 + x21/k42 + x3/k43 + x6/k54)) + (-1)*k55*k28*x5)/k55,
  diff(x6, t) = 1*k55*k18*x16*x5/(x5 + k19*(1 + x21/k42 + x3/k43 + x6/k54))/k55,
  diff(x7, t) = 0/k55,
  diff(x8, t) = (1*k55*k53*x23*x23/(x23*x23 + k52*k52) + (-1)*k55*k29*x8)/k55,
  diff(x9, t) = (-1)*k55*k45*x12*x9/k55,
  diff(x10, t) = 0/k55,
  diff(x11, t) = 0/k55,
  diff(x12, t) = (1*k55*k4*x8*x1/(x1 + k5*(1 + x12/k54)) + (-1)*k55*k20*x17*x12/(x12 + k21*(1 + x19/k54)) + (-1)*k22*k55*x12)/k55,
  diff(x13, t) = ((-1)*k33*x12*x13*k55 + (-1)*k55*k34*x22*x13)/k55,
  diff(x14, t) = (1*k55*k51*x5*x14 + (-1)*k55*k38*x4*x14 + (-1)*k55*k39*x2*x14 + (-1)*k55*k35*x14*x12)/k55,
  diff(x15, t) = (-1)*k55*k16*x15*x4/((x4 + k17)*129)/k55,
  diff(x16, t) = 0/k55,
  diff(x17, t) = 0/k55,
  diff(x18, t) = 0/k55,
  diff(x19, t) = (1*k55*k20*x17*x12/(x12 + k21*(1 + x19/k54)) + (-1)*k23*x19*k55)/k55,
  diff(x20, t) = (1*k55*k6*x9*x1/(x1 + k7*(1 + x20/k46 + x19/k44 + x20/k54)) + (-1)*k55*k20*x17*x20/(x20 + k21*(1 + x21/k54)))/k55,
  diff(x21, t) = 1*k55*k20*x17*x20/(x20 + k21*(1 + x21/k54))/k55,
  diff(x22, t) = (1*k55*k8*x10*x1/(x1 + k9*(1 + x23/k32 + x22/k54)) + (-1)*k55*k10*x11*x22/(x22 + k11*(1 + x1/k30 + x19/k31 + x23/k54)) + (-1)*k55*k12*x13*x22/(x22 + k13*(1 + x24/k54)))/k55,
  diff(x23, t) = 1*k55*k10*x11*x22/(x22 + k11*(1 + x1/k30 + x19/k31 + x23/k54))/k55,
  diff(x24, t) = (1*k55*k12*x13*x22/(x22 + k13*(1 + x24/k54)) + (-1)*k55*k24*x24)/k55,
  diff(x25, t) = (1*k24*x24*k55 + (-1)*k25*x25*k55)/k55 }