[ Eq(Derivative(x1, t), ((-1)*k57*(k10*k1 + k11*x10 + k12*x11)*x1 + 1*k57*k13*x2 + 1*k57*k9*x4 + (-1)*k57*(k7*x1*x3 - k8*x4))/k57),
  Eq(Derivative(x2, t), (1*k57*(k10*k1 + k11*x10 + k12*x11)*x1 + 1*k57*(k10*k1 + k11*x10 + k12*x11)*x4 + (-1)*k57*k13*x2)/k57),
  Eq(Derivative(x3, t), (1*k57*(k10*k1 + k11*x10 + k12*x11)*x4 + 1*k57*(k4 + k5*x3/(k6 + x3)) + (-1)*k57*k9*x3 + (-1)*k57*(k7*x1*x3 - k8*x4))/k57),
  Eq(Derivative(x4, t), ((-1)*k57*(k10*k1 + k11*x10 + k12*x11)*x4 + (-1)*k57*k9*x4 + 1*k57*(k7*x1*x3 - k8*x4))/k57),
  Eq(Derivative(x5, t), (1*k57*k14*x3 + (-1)*k57*k16*x5 + (-1)*k57*(k21*x5*x6 - k22*x8) + 1*k57*(k17 + k18*x10 + k19*x11)*x8)/k57),
  Eq(Derivative(x6, t), ((-1)*k57*(k21*x5*x6 - k22*x8) + 1*k57*k15*x8 + (-1)*k57*(k17 + k18*x10 + k19*x11)*x6 + 1*k57*k20*x7)/k57),
  Eq(Derivative(x7, t), (1*k57*(k17 + k18*x10 + k19*x11)*x6 + 1*k57*(k17 + k18*x10 + k19*x11)*x8 + (-1)*k57*k20*x7)/k57),
  Eq(Derivative(x8, t), (1*k57*(k21*x5*x6 - k22*x8) + (-1)*k57*k15*x8 + (-1)*k57*(k17 + k18*x10 + k19*x11)*x8)/k57),
  Eq(Derivative(x9, t), (1*k57*(k23 + k24*x21) + (-1)*k57*(k30*x10*x9 - k31*x12) + (-1)*k57*(k30*x11*x9 - k31*x13) + 1*k57*(k32 + k34*x11)*x12 + 1*k57*(k33 + k35*x6)*x13 + (-1)*k57*(k25 + k26*k2*(x10 + x11) + k27*k3*x18)*x9 + 1*k57*k37*x15 + (-1)*k57*(k44*x14*x9 - k45*x15) + (-1)*k57*(k44*x18*x9 - k45*x19))/k57),
  Eq(Derivative(x10, t), (1*k57*k28*x3 + (-1)*k57*(k30*x10*x9 - k31*x12) + 1*k57*(k25 + k26*k2*(x10 + x11) + k27*k3*x18)*x12 + (-1)*k57*(k32 + k34*x11)*x10)/k57),
  Eq(Derivative(x11, t), (1*k57*k29*x3 + (-1)*k57*(k30*x11*x9 - k31*x13) + 1*k57*(k25 + k26*k2*(x10 + x11) + k27*k3*x18)*x13 + (-1)*k57*(k33 + k35*x6)*x11)/k57),
  Eq(Derivative(x12, t), (1*k57*(k30*x10*x9 - k31*x12) + (-1)*k57*(k25 + k26*k2*(x10 + x11) + k27*k3*x18)*x12 + (-1)*k57*(k32 + k34*x11)*x12)/k57),
  Eq(Derivative(x13, t), (1*k57*(k30*x11*x9 - k31*x13) + (-1)*k57*(k25 + k26*k2*(x10 + x11) + k27*k3*x18)*x13 + (-1)*k57*(k33 + k35*x6)*x13)/k57),
  Eq(Derivative(x14, t), (1*k57*k36 + (-1)*k57*k37*x14 + (-1)*k57*(k44*x14*x9 - k45*x15) + 1*k57*(k25 + k26*k2*(x10 + x11) + k27*k3*x18)*x15 + (-1)*k57*(k42*x14*x17 - k43*x18) + 1*k57*Piecewise((0, Lt(x20, 1)), (Piecewise((1*x18, Gt(x20, 1)), (1/2*x18, True)), True)))/k57),
  Eq(Derivative(x15, t), ((-1)*k57*k37*x15 + 1*k57*(k44*x14*x9 - k45*x15) + (-1)*k57*(k25 + k26*k2*(x10 + x11) + k27*k3*x18)*x15 + (-1)*k57*(k42*x15*x17 - k43*x19) + 1*k57*Piecewise((0, Lt(x20, 1)), (Piecewise((1*x19, Gt(x20, 1)), (1/2*x19, True)), True)))/k57),
  Eq(Derivative(x16, t), ((-1)*k57*k38*(x10 + x11)**k41/(k40**k41 + (x10 + x11)**k41)*x16 + 1*k57*k39*x17 + (-1)*k57*Piecewise((0, Lt(x20, 1)), (Piecewise((1*x16, Gt(x20, 1)), (1/2*x16, True)), True)))/k57),
  Eq(Derivative(x17, t), ((-1)*k57*(k42*x14*x17 - k43*x18) + (-1)*k57*(k42*x15*x17 - k43*x19) + 1*k57*k38*(x10 + x11)**k41/(k40**k41 + (x10 + x11)**k41)*x16 + (-1)*k57*k39*x17 + (-1)*k57*Piecewise((0, Lt(x20, 1)), (Piecewise((1*x17, Gt(x20, 1)), (1/2*x17, True)), True)))/k57),
  Eq(Derivative(x18, t), (1*k57*(k42*x14*x17 - k43*x18) + (-1)*k57*(k44*x18*x9 - k45*x19) + 1*k57*(k25 + k26*k2*(x10 + x11) + k27*k3*x18)*x19 + (-1)*k57*Piecewise((0, Lt(x20, 1)), (Piecewise((1*x18, Gt(x20, 1)), (1/2*x18, True)), True)))/k57),
  Eq(Derivative(x19, t), (1*k57*(k42*x15*x17 - k43*x19) + 1*k57*(k44*x18*x9 - k45*x19) + (-1)*k57*(k25 + k26*k2*(x10 + x11) + k27*k3*x18)*x19 + (-1)*k57*Piecewise((0, Lt(x20, 1)), (Piecewise((1*x19, Gt(x20, 1)), (1/2*x19, True)), True)))/k57),
  Eq(Derivative(x20, t), 1*k57*k46*x18/k57),
  Eq(Derivative(x21, t), (1*k57*k47 + (-1)*k57*k48/(k49 + x22)*x21)/k57),
  Eq(Derivative(x22, t), (1*k57*k50 + 1*k57*k51*x18 + (-1)*k57*(k52 + k53*x21/(k54 + x22))*x22)/k57),
  Eq(Derivative(x23, t), (1*k57*k55 + (-1)*k57*(k56 + k35*x6)*x23)/k57) ]