{ diff(x1, t) = ((-1)*k49*k39*x1*x7 + 1*k49*x8*k18*k39 + 1*k49*x10*k15*k43 + 1*k49*x10*k14*k35 + (-1)*k49*k28*x1 + 1*k49*x3*k16*k28 + 1*k49*k2*k28*k34^2/(k28*k34 + k34^2 + k16*k28*k34))/k49,
  diff(x2, t) = ((-1)*k49*x5*x2*k40 + 1*k49*x7*k19*k40 + 1*k49*x10*k15*k43 + (-1)*k49*k29*x2 + 1*k49*x4*k17*k29 + 1*k49*k3*k29*k35^2/(k29*k35 + k35^2 + k17*k29*k35))/k49,
  diff(x3, t) = (1*k49*k35*x9 + 1*k49*k43*x9 + (-1)*k49*k34*x3 + 1*k49*k28*x1 + (-1)*k49*x3*k16*k28 + 1*k49*k27*x9)/k49,
  diff(x4, t) = (1*k49*k34*x9 + 1*k49*k43*x9 + (-1)*k49*k35*x4 + 1*k49*k29*x2 + (-1)*k49*x4*k17*k29 + 1*k49*k27*x9)/k49,
  diff(x5, t) = ((-1)*k49*x5*x2*k40/k31 + 1*k49*x7*k19*k40/k31)/k49,
  diff(x6, t) = (1*k49*k35*x9 + 1*k49*k34*x9 + 1*k49*x10*k14*k35 + 1*k49*k27*x9 + (-1)*k49*k43*x6)/k49,
  diff(x7, t) = (1*k49*x5*x2*k40 + (-1)*k49*x7*k19*k40 + (-1)*k49*k39*x1*x7 + 1*k49*x8*k18*k39)/k49,
  diff(x8, t) = (1*k49*k39*x1*x7 + (-1)*k49*x8*k18*k39 + (-1)*k49*k41*x8*x17 + 1*k49*x10*k22*k41 + (-1)*k49*x8*k13*k28)/k49,
  diff(x9, t) = ((-1)*k49*k35*x9 + (-1)*k49*k34*x9 + (-1)*k49*k43*x9 + 1*k49*x8*k13*k28 + (-1)*k49*k27*x9)/k49,
  diff(x10, t) = (1*k49*k41*x8*x17 + (-1)*k49*x10*k22*k41 + (-1)*k49*x10*k15*k43 + (-1)*k49*x10*k14*k35)/k49,
  diff(x11, t) = (1*k49*x9*x12*k32 + (-2)*k49*k42*x11^2*x13 + 2*k49*k33*x14 + (-3)*k49*k21*k42*x11^3 + 3*k49*k20*k33*x15 + (-1)*k49*k5*x11 + 1*k50*k4*x19 + (-1)*k49*k36*x11 + 1*k49*k36*x14 + 2*k49*k37*x14 + 2*k49*k36*x15)/k49,
  diff(x12, t) = ((-1)*k49*x9*x12*k32 + (-1)*k49*x12*k5 + 1*k50*x22*k4 + 1*k49*k6*(k5*k36 + k4*k36 + k36^2)/(2*k5 + k4 + k36) + (-1)*k49*k36*x12)/k49,
  diff(x13, t) = ((-1)*k49*k42*x11^2*x13 + 1*k49*k33*x14 + (-1)*k49*x13*k8 + 1*k50*x23*k7 + 1*k49*k9*(k8*k37 + k7*k37 + k37^2)/(2*k8 + k7 + k37) + (-1)*k49*k37*x13 + 1*k49*k36*x14)/k49,
  diff(x14, t) = (1*k49*k42*x11^2*x13 + (-1)*k49*k33*x14 + (-1)*k49*k10*x14 + (-1)*k49*k36*x14 + (-1)*k49*k37*x14)/k49,
  diff(x15, t) = (1*k49*k21*k42*x11^3 + (-1)*k49*k20*k33*x15 + (-1)*k49*k10*x15 + (-1)*k49*k36*x15)/k49,
  diff(x16, t) = (1*k50*x18*k11 + (-1)*k49*k45*x16)/k49,
  diff(x17, t) = ((-1)*k49*k41*x8*x17 + 1*k49*x10*k22*k41 + 1*k49*x10*k15*k43 + 1*k49*x10*k14*k35 + 1*k49*x16*k26 + (-1)*k49*k38*x17)/k49,
  diff(x18, t) = (1*k50*(k46 + k30*x20^k12/(k1^k12 + x20^k12)) + (-1)*k50*x18*k11 + (-1)*k50*k44*x18)/k50,
  diff(x19, t) = ((-2)*k50*k42*x19^2*x23 + 2*k50*k33*x20 + (-3)*k50*k21*k42*x19^3 + 3*k50*k20*k33*x21 + 1*k49*k5*x11 + (-1)*k50*k4*x19 + (-1)*k50*k25*x19 + 1*k50*k23*k25*x20 + (-1)*k50*k36*x19 + 1*k50*k36*x20 + 2*k50*k37*x20 + 2*k50*k36*x21)/k50,
  diff(x20, t) = (1*k50*k42*x19^2*x23 + (-1)*k50*k33*x20 + 1*k49*k10*x14 + (-1)*k50*k23*k25*x20 + (-1)*k50*k36*x20 + (-1)*k50*k37*x20)/k50,
  diff(x21, t) = (1*k50*k21*k42*x19^3 + (-1)*k50*k20*k33*x21 + 1*k49*k10*x15 + (-1)*k50*k36*x21)/k50,
  diff(x22, t) = (1*k49*x12*k5 + (-1)*k50*x22*k4 + 1*k50*k25*x19 + 1*k50*k23*k25*x20 + (-1)*k50*k36*x22)/k50,
  diff(x23, t) = ((-1)*k50*k42*x19^2*x23 + 1*k50*k33*x20 + 1*k49*x13*k8 + (-1)*k50*x23*k7 + 1*k50*k23*k25*x20 + (-1)*k50*k37*x23 + 1*k50*k36*x20)/k50 }