[ Eq(Derivative(x1, t), (1*k1*(k2*(x7*x11 - x1*x10/k3)/((k4*(1 + (x6/k5)**k6)/(1 + (x6/(k7*k5))**k6) + k4*x1/k8 + x7)*(k9*(1 + x10/k10) + x11)) + k11*(x7*x11 - x1*x10/k3)/((1 + (k12/k13)**k14)*(k15*(1 + x1/k16) + x7)*(k17*(1 + x10/k18) + x11))) + (-1)*k1*k19*(x1*x9 - x2*x8*x5/k20)/((k21*(1 + x2/k22)*(1 + x5/k23) + x1)*(k24*(1 + x8/k25) + x9)))/k1),
  Eq(Derivative(x2, t), (1*k1*k19*(x1*x9 - x2*x8*x5/k20)/((k21*(1 + x2/k22)*(1 + x5/k23) + x1)*(k24*(1 + x8/k25) + x9)) + (-1)*k1*k26*(x2*x9 - x3*x8/k27)/((1 + (x6/k28)**k29)/(1 + (x6/(k30*k28))**k29)*(k31 + x2 + x3*k31/k32)*(k33*(1 + x8/k34) + x9)))/k1),
  Eq(Derivative(x3, t), (1*k1*k26*(x2*x9 - x3*x8/k27)/((1 + (x6/k28)**k29)/(1 + (x6/(k30*k28))**k29)*(k31 + x2 + x3*k31/k32)*(k33*(1 + x8/k34) + x9)) + (-1)*k1*k37*x3*x11/((1 + k38/k39)*(x11 + k40*(1 + x3/k41))*(x3 + k42*(1 + x6/k43)*(1 + x11/k44))))/k1),
  Eq(Derivative(x4, t), ((-1)*k1*k35*x4/(x4 + k36) + 1*k1*k37*x3*x11/((1 + k38/k39)*(x11 + k40*(1 + x3/k41))*(x3 + k42*(1 + x6/k43)*(1 + x11/k44))))/k1),
  Eq(Derivative(x5, t), (1*k1*k19*(x1*x9 - x2*x8*x5/k20)/((k21*(1 + x2/k22)*(1 + x5/k23) + x1)*(k24*(1 + x8/k25) + x9)) + 1*k1*k35*x4/(x4 + k36) + 1*k1*k48*k47)/k1),
  Eq(Derivative(x6, t), 1*k1*k35*x4/(x4 + k36)/k1),
  Eq(Derivative(x7, t), (-1)*k1*(k2*(x7*x11 - x1*x10/k3)/((k4*(1 + (x6/k5)**k6)/(1 + (x6/(k7*k5))**k6) + k4*x1/k8 + x7)*(k9*(1 + x10/k10) + x11)) + k11*(x7*x11 - x1*x10/k3)/((1 + (k12/k13)**k14)*(k15*(1 + x1/k16) + x7)*(k17*(1 + x10/k18) + x11)))/k1),
  Eq(Derivative(x8, t), (1*k1*k19*(x1*x9 - x2*x8*x5/k20)/((k21*(1 + x2/k22)*(1 + x5/k23) + x1)*(k24*(1 + x8/k25) + x9)) + 1*k1*k26*(x2*x9 - x3*x8/k27)/((1 + (x6/k28)**k29)/(1 + (x6/(k30*k28))**k29)*(k31 + x2 + x3*k31/k32)*(k33*(1 + x8/k34) + x9)) + 1*k1*k46*k45*x9)/k1),
  Eq(Derivative(x9, t), ((-1)*k1*k19*(x1*x9 - x2*x8*x5/k20)/((k21*(1 + x2/k22)*(1 + x5/k23) + x1)*(k24*(1 + x8/k25) + x9)) + (-1)*k1*k26*(x2*x9 - x3*x8/k27)/((1 + (x6/k28)**k29)/(1 + (x6/(k30*k28))**k29)*(k31 + x2 + x3*k31/k32)*(k33*(1 + x8/k34) + x9)) + (-1)*k1*k46*k45*x9)/k1),
  Eq(Derivative(x10, t), (1*k1*(k2*(x7*x11 - x1*x10/k3)/((k4*(1 + (x6/k5)**k6)/(1 + (x6/(k7*k5))**k6) + k4*x1/k8 + x7)*(k9*(1 + x10/k10) + x11)) + k11*(x7*x11 - x1*x10/k3)/((1 + (k12/k13)**k14)*(k15*(1 + x1/k16) + x7)*(k17*(1 + x10/k18) + x11))) + 1*k1*k37*x3*x11/((1 + k38/k39)*(x11 + k40*(1 + x3/k41))*(x3 + k42*(1 + x6/k43)*(1 + x11/k44))) + 1*k1*k48*k47)/k1),
  Eq(Derivative(x11, t), ((-1)*k1*(k2*(x7*x11 - x1*x10/k3)/((k4*(1 + (x6/k5)**k6)/(1 + (x6/(k7*k5))**k6) + k4*x1/k8 + x7)*(k9*(1 + x10/k10) + x11)) + k11*(x7*x11 - x1*x10/k3)/((1 + (k12/k13)**k14)*(k15*(1 + x1/k16) + x7)*(k17*(1 + x10/k18) + x11))) + (-1)*k1*k37*x3*x11/((1 + k38/k39)*(x11 + k40*(1 + x3/k41))*(x3 + k42*(1 + x6/k43)*(1 + x11/k44))) + (-1)*k1*k48*k47)/k1) ]