[ Eq(Derivative(x1, t), ((-1)*k1*(k3*x1*x2 - k4*x3) + (-1)*k1*(k71*k75*x1 - k72*x34))/k1),
  Eq(Derivative(x2, t), ((-1)*k1*(k3*x1*x2 - k4*x3) + (-1)*k1*(k73*x34*x2 - k74*x4))/k1),
  Eq(Derivative(x3, t), (1*k1*(k3*x1*x2 - k4*x3) + (-1)*k1*(k5*k75*x3 - k6*x4))/k1),
  Eq(Derivative(x4, t), (1*k1*(k5*k75*x3 - k6*x4) + (-2)*k1*(k7*x4*x4 - k8*x5) + 1*k1*(k73*x34*x2 - k74*x4))/k1),
  Eq(Derivative(x5, t), (1*k1*(k7*x4*x4 - k8*x5) + (-1)*k1*k9*x5 + 1*k1*k19*x13 + 1*k1*k52*x27 + 1*k1*k60*x32 + 1*k1*k63*x33)/k1),
  Eq(Derivative(x6, t), (1*k1*k9*x5 + (-1)*k1*(k10*x7*x6 - k11*x8) + 1*k1*k12*x8 + (-1)*k1*(k13*x6*x9 - k14*x10) + (-1)*k1*(k17*x6*x12 - k18*x13) + (-1)*k1*(k46*x25*x6 - k47*x26) + 1*k1*k64*x26)/k1),
  Eq(Derivative(x7, t), ((-1)*k1*(k10*x7*x6 - k11*x8) + 1*k1*k22*x15 + (-1)*k1*(k26*x7*x9 - k27*x16) + 1*k2*k39*x21 + (-1)*k1*(k48*x7*x26 - k49*x30) + 1*k1*k52*x27 + (-1)*k1*(k56*x7*x33 - k57*x27) + 1*k1*k60*x32)/k1),
  Eq(Derivative(x8, t), (1*k1*(k10*x7*x6 - k11*x8) + (-1)*k1*k12*x8 + (-1)*k1*(k58*x12*x8 - k59*x32) + 1*k1*k61*x30 + (-1)*k1*(k65*x25*x8 - k66*x30))/k1),
  Eq(Derivative(x9, t), (1*k1*k12*x8 + (-1)*k1*(k13*x6*x9 - k14*x10) + (-2)*k1*(k15*x9*x9 - k16*x11) + (-1)*k1*(k20*x14*x9 - k21*x15) + (-1)*k1*(k26*x7*x9 - k27*x16))/k1),
  Eq(Derivative(x10, t), 1*k1*(k13*x6*x9 - k14*x10)/k1),
  Eq(Derivative(x11, t), (1*k1*(k15*x9*x9 - k16*x11) + (-1)*k1*(k23*x14*x11 - k24*x28) + (-1)*k1*k28*x11)/k1),
  Eq(Derivative(x12, t), ((-1)*k1*(k17*x6*x12 - k18*x13) + 1*k1*k19*x13 + (-1)*k1*(k50*x12*x30 - k51*x27) + 1*k1*k52*x27 + (-1)*k1*(k54*x12*x26 - k55*x33) + (-1)*k1*(k58*x12*x8 - k59*x32) + 1*k1*k60*x32 + 1*k1*k63*x33)/k1),
  Eq(Derivative(x13, t), (1*k1*(k17*x6*x12 - k18*x13) + (-1)*k1*k19*x13 + 1*k1*k62*x33 + (-1)*k1*(k67*x25*x13 - k68*x33))/k1),
  Eq(Derivative(x14, t), ((-1)*k1*(k20*x14*x9 - k21*x15) + 1*k1*k22*x15 + (-1)*k1*(k23*x14*x11 - k24*x28) + 1*k1*k25*x28)/k1),
  Eq(Derivative(x15, t), (1*k1*(k20*x14*x9 - k21*x15) + (-1)*k1*k22*x15)/k1),
  Eq(Derivative(x16, t), (1*k1*k25*x28 + 1*k1*(k26*x7*x9 - k27*x16))/k1),
  Eq(Derivative(x17, t), (1*k1*k28*x11 + 1*k2*(k29*x18*x18 - k30*x17) + (-1)*k2*(k34*x19*x17 - k35*x29))/k2),
  Eq(Derivative(x18, t), ((-2)*k2*(k29*x18*x18 - k30*x17) + (-1)*k2*(k31*x19*x18 - k32*x20) + (-1)*k2*(k37*x21*x18 - k38*x22))/k2),
  Eq(Derivative(x19, t), ((-1)*k2*(k31*x19*x18 - k32*x20) + 1*k2*k33*x20 + (-1)*k2*(k34*x19*x17 - k35*x29) + 1*k2*k36*x29)/k2),
  Eq(Derivative(x20, t), (1*k2*(k31*x19*x18 - k32*x20) + (-1)*k2*k33*x20)/k2),
  Eq(Derivative(x21, t), (1*k2*k33*x20 + (-1)*k2*(k37*x21*x18 - k38*x22) + (-1)*k2*k39*x21)/k2),
  Eq(Derivative(x22, t), (1*k2*k36*x29 + 1*k2*(k37*x21*x18 - k38*x22))/k2),
  Eq(Derivative(x23, t), (1*k2*k40*x17/(k41 + x17) + (-1)*k2*k42*x23)/k2),
  Eq(Derivative(x24, t), (1*k2*k42*x23 + (-1)*k1*k44*x24)/k1),
  Eq(Derivative(x25, t), (1*k1*k43*x24 + (-1)*k1*k45*x25 + (-1)*k1*(k46*x25*x6 - k47*x26) + 1*k1*k52*x27 + 1*k1*k63*x33 + (-1)*k1*(k65*x25*x8 - k66*x30) + (-1)*k1*(k67*x25*x13 - k68*x33) + (-1)*k1*(k69*x25*x32 - k70*x27))/k1),
  Eq(Derivative(x26, t), (1*k1*(k46*x25*x6 - k47*x26) + (-1)*k1*(k48*x7*x26 - k49*x30) + (-1)*k1*(k54*x12*x26 - k55*x33) + (-1)*k1*k64*x26)/k1),
  Eq(Derivative(x27, t), (1*k1*(k50*x12*x30 - k51*x27) + (-1)*k1*k52*x27 + (-1)*k1*k53*x27 + 1*k1*(k56*x7*x33 - k57*x27) + 1*k1*(k69*x25*x32 - k70*x27))/k1),
  Eq(Derivative(x28, t), (1*k1*(k23*x14*x11 - k24*x28) + (-1)*k1*k25*x28)/k1),
  Eq(Derivative(x29, t), (1*k2*(k34*x19*x17 - k35*x29) + (-1)*k2*k36*x29)/k2),
  Eq(Derivative(x30, t), (1*k1*(k48*x7*x26 - k49*x30) + (-1)*k1*(k50*x12*x30 - k51*x27) + (-1)*k1*k61*x30 + 1*k1*(k65*x25*x8 - k66*x30))/k1),
  Eq(Derivative(x31, t), 0),
  Eq(Derivative(x32, t), (1*k1*k53*x27 + 1*k1*(k58*x12*x8 - k59*x32) + (-1)*k1*k60*x32 + (-1)*k1*(k69*x25*x32 - k70*x27))/k1),
  Eq(Derivative(x33, t), (1*k1*(k54*x12*x26 - k55*x33) + (-1)*k1*(k56*x7*x33 - k57*x27) + (-1)*k1*k62*x33 + (-1)*k1*k63*x33 + 1*k1*(k67*x25*x13 - k68*x33))/k1),
  Eq(Derivative(x34, t), (1*k1*(k71*k75*x1 - k72*x34) + (-1)*k1*(k73*x34*x2 - k74*x4))/k1) ]