[ Eq(Derivative(x1, t), (1*k50*k24 + 1*k50*k26*x1*(1 - x1/k27)*x1**k28/(x1**k28 + k29**k28) + 1*k50*x8*k31*x6/(x6 + k30) + (-1)*k50*k35*x1*x6 + (-1)*k50*k32*x1*x6**k33/(x6**k33 + k34**k33) + (-1)*k50*k25*x1)/k50),
  Eq(Derivative(x2, t), (1*k50*k37 + 1*k50*k38*x2*(1 - x2/k39)*x2/(x2 + k40) + (-1)*k50*k43*x2*x6/(x6 + k44)*x1**k41/(x1**k41 + k42**k41) + (-1)*k50*k36*x2)/k50),
  Eq(Derivative(x3, t), (1*k50*k1 + 1*k50*k8*x3*(1 - x3/(k9 - k9*k10)) + 1*k50*x9*k11*x6/(x6 + k12) + 1*k50*k15*x4*x1/(x1 + k16) + (-1)*k50*k5*x3*x6/(x6 + k6) + (-1)*k50*k3*x3*x6/(x6 + k4) + (-1)*k50*k7*x3*x6 + (-1)*k50*k2*x3)/k50),
  Eq(Derivative(x4, t), ((-1)*k50*k15*x4*x1/(x1 + k16) + 1*k50*k3*x3*x6/(x6 + k4) + (-1)*k50*k13*x4 + (-1)*k50*k14*x4*x6)/k50),
  Eq(Derivative(x5, t), (1*k50*k5*x3*x6/(x6 + k6) + (-1)*k50*k18*x5*x7**k19/(x7**k19 + (k17*x5)**k19) + (-1)*k50*(1 - k22*x7/(x7 + k17 + x5))*k20*(x1 + x2/x5)/(x1 + x2/x5 + k21) + (-1)*k50*k23*x5)/k50),
  Eq(Derivative(x6, t), ((-1)*k50*k5*x3*x6/(x6 + k6) + (-1)*k50*k7*x3*x6 + (-1)*k50*k35*x1*x6 + (-1)*k50*k14*x4*x6 + 1*k50*k18*x5*x7**k19/(x7**k19 + (k17*x5)**k19) + 1*k50*k46*x6*(1 - x6/k47) + (-1)*k50*k45*x6)/k50),
  Eq(Derivative(x7, t), ((-1)*k50*k18*x5*x7**k19/(x7**k19 + (k17*x5)**k19) + (-1)*k50*k48*x7 + 1*k50*k49*x7*(1 - x7/(x7 + k17*x5)) + 1*k50*k5*x3*x7/(x7 + k4) + (-1)*k50*k20*(x1 + x2/x5)/(x1 + x2/x5 + k21))/k50),
  Eq(Derivative(x8, t), (-1)*k50*x8*k31*x6/(x6 + k30)/k50),
  Eq(Derivative(x9, t), (-1)*k50*x9*k11*x6/(x6 + k12)/k50) ]