{ diff(x1, t) = (-1)*k76*(k28*x15*x1 - k68*x2)/k76,
  diff(x2, t) = (1*k76*(k28*x15*x1 - k68*x2) + (-1)*k76*k29*x2/(k60*(1 + x3/k62) + x2) + 1*k76*k30*x36*x3/(k61*(1 + x11/k67 + x12/k49 + x4/k63) + x3))/k76,
  diff(x3, t) = (1*k76*k29*x2/(k60*(1 + x3/k62) + x2) + (-1)*k76*k30*x36*x3/(k61*(1 + x11/k67 + x12/k49 + x4/k63) + x3) + (-1)*k76*k31*x3/(k62*(1 + x2/k60) + x3) + 1*k76*k32*x36*x4/(k63*(1 + x11/k67 + x12/k49 + x3/k61) + x4))/k76,
  diff(x4, t) = (1*k76*k31*x3/(k62*(1 + x2/k60) + x3) + (-1)*k76*k32*x36*x4/(k63*(1 + x11/k67 + x12/k49 + x3/k61) + x4))/k76,
  diff(x5, t) = ((-1)*k76*k19*x12*x5/(k50*(1 + x6/k52) + x5) + 1*k76*k17*x35*x6/(k51*(1 + x7/k53) + x6))/k76,
  diff(x6, t) = (1*k76*k19*x12*x5/(k50*(1 + x6/k52) + x5) + (-1)*k76*k17*x35*x6/(k51*(1 + x7/k53) + x6) + (-1)*k76*k20*x12*x6/(k52*(1 + x5/k50) + x6) + 1*k76*k21*x35*x7/(k53*(1 + x6/k51) + x7))/k76,
  diff(x7, t) = (1*k76*k20*x12*x6/(k52*(1 + x5/k50) + x6) + (-1)*k76*k21*x35*x7/(k53*(1 + x6/k51) + x7))/k76,
  diff(x8, t) = ((-1)*k76*(k6*x23*x8 - k40*x22) + 1*k76*(k8*x29 - k42*x8*x30))/k76,
  diff(x9, t) = (-1)*k76*(k1*x16*x9 - k34*x18)/k76,
  diff(x10, t) = ((-1)*k76*k14*x26*x10/(k48*(1 + x11/k66) + x10) + 1*k76*k15*x36*x11/(k67*(1 + x12/k49 + x3/k61 + x4/k63) + x11))/k76,
  diff(x11, t) = (1*k76*k14*x26*x10/(k48*(1 + x11/k66) + x10) + (-1)*k76*k15*x36*x11/(k67*(1 + x12/k49 + x3/k61 + x4/k63) + x11) + (-1)*k76*k16*x26*x11/(k66*(1 + x10/k48) + x11) + 1*k76*k18*x36*x12/(k49*(1 + x11/k67 + x4/k61 + x4/k63) + x12))/k76,
  diff(x12, t) = (1*k76*k16*x26*x11/(k66*(1 + x10/k48) + x11) + (-1)*k76*k18*x36*x12/(k49*(1 + x11/k67 + x4/k61 + x4/k63) + x12))/k76,
  diff(x13, t) = ((-1)*k76*(k22*x17*x13 - k54*x20) + 1*k76*k26*x14/(k57 + x14))/k76,
  diff(x14, t) = (1*k76*(k24*x21 - k56*x17*x14) + (-1)*k76*k26*x14/(k57 + x14))/k76,
  diff(x15, t) = ((-1)*k76*(k28*x15*x1 - k68*x2) + (-1)*k76*k27*x15/(k59 + x15) + 1*k76*k25*x14*x32/(k58 + x32))/k76,
  diff(x16, t) = (-1)*k76*(k1*x16*x9 - k34*x18)/k76,
  diff(x17, t) = (1*k76*(k3*x19 - k36*x17) + (-1)*k76*k65*x17/(k37 + x17) + (-1)*k76*(k4*x17*x31 - k38*x24) + 1*k76*(k7*x22 - k41*x29*x17) + (-1)*k76*(k22*x17*x13 - k54*x20) + 1*k76*(k24*x21 - k56*x17*x14) + (-1)*k76*(k33*x17 - k64*x33))/k76,
  diff(x18, t) = (1*k76*(k1*x16*x9 - k34*x18) + (-2)*k76*(k2*x18^2 - k35*x19))/k76,
  diff(x19, t) = (1*k76*(k2*x18^2 - k35*x19) + (-1)*k76*(k3*x19 - k36*x17) + 1*k76*k65*x17/(k37 + x17))/k76,
  diff(x20, t) = (1*k76*(k22*x17*x13 - k54*x20) + (-1)*k76*(k23*x20 - k55*x21))/k76,
  diff(x21, t) = (1*k76*(k23*x20 - k55*x21) + (-1)*k76*(k24*x21 - k56*x17*x14))/k76,
  diff(x22, t) = (1*k76*(k6*x23*x8 - k40*x22) + (-1)*k76*(k7*x22 - k41*x29*x17))/k76,
  diff(x23, t) = (1*k76*(k5*x24 - k39*x23) + (-1)*k76*(k6*x23*x8 - k40*x22))/k76,
  diff(x24, t) = (1*k76*(k4*x17*x31 - k38*x24) + (-1)*k76*(k5*x24 - k39*x23))/k76,
  diff(x25, t) = ((-1)*k76*k12*x28*x25/(k46 + x25) + 1*k76*k13*(x4 + x34)*x26/(k47 + x26))/k76,
  diff(x26, t) = (1*k76*k12*x28*x25/(k46 + x25) + (-1)*k76*k13*(x4 + x34)*x26/(k47 + x26))/k76,
  diff(x27, t) = ((-1)*k76*k10*x29*x27/(k44 + x27) + 1*k76*k11*x28/(k45 + x28))/k76,
  diff(x28, t) = (1*k76*k10*x29*x27/(k44 + x27) + (-1)*k76*k11*x28/(k45 + x28))/k76,
  diff(x29, t) = (1*k76*(k7*x22 - k41*x29*x17) + (-1)*k76*(k8*x29 - k42*x8*x30))/k76,
  diff(x30, t) = (1*k76*(k8*x29 - k42*x8*x30) + (-1)*k76*k9*x30/(k43 + x30))/k76,
  diff(x31, t) = ((-1)*k76*(k4*x17*x31 - k38*x24) + 1*k76*k9*x30/(k43 + x30))/k76,
  diff(x32, t) = (1*k76*k27*x15/(k59 + x15) + (-1)*k76*k25*x14*x32/(k58 + x32))/k76,
  diff(x33, t) = 1*k76*(k33*x17 - k64*x33)/k76,
  diff(x34, t) = 0/k76,
  diff(x35, t) = 0/k76,
  diff(x36, t) = 0/k76 }