[ Eq(Derivative(x1, t), (-1)*k76*(k1*x1*x51/k2 - k3*x2)/k76),
  Eq(Derivative(x2, t), (1*k76*(k1*x1*x51/k2 - k3*x2) + (-1)*k76*(k44*x31*x2 - k45*x35))/k76),
  Eq(Derivative(x3, t), ((-1)*k76*(k4*x3*x51/k2 - k5*x4) + (-1)*k76*k70*x3*x39)/k76),
  Eq(Derivative(x4, t), (1*k76*(k4*x3*x51/k2 - k5*x4) + (-1)*k76*(k46*x31*x4 - k47*x36) + (-1)*k76*(k62*x6*x4 - k63*x46) + 1*k76*k64*x46)/k76),
  Eq(Derivative(x5, t), (-1)*k76*(k6*x5*x51/k2 - k7*x6)/k76),
  Eq(Derivative(x6, t), (1*k76*(k6*x5*x51/k2 - k7*x6) + (-1)*k76*(k38*x6*x16 - k39*x32) + (-1)*k76*(k41*x6*x33 - k42*x34) + (-1)*k76*(k62*x6*x4 - k63*x46))/k76),
  Eq(Derivative(x7, t), (-1)*k76*(k8*x7*x51/k2 - k9*x8)/k76),
  Eq(Derivative(x8, t), (1*k76*(k8*x7*x51/k2 - k9*x8) + (-1)*k76*(k36*x16*x8 - k37*x31) + 1*k76*k40*x32 + 1*k76*k43*x34 + (-1)*k76*(k53*x37*x8 - k54*x43) + 1*k76*k64*x46)/k76),
  Eq(Derivative(x9, t), (-1)*k76*(k10*x9*x51/k2 - k11*x10)/k76),
  Eq(Derivative(x10, t), (1*k76*(k10*x9*x51/k2 - k11*x10) + (-1)*k76*(k28*x25*x10 - k29*x27) + (-1)*k76*(k50*x10*x16 - k51*x45))/k76),
  Eq(Derivative(x11, t), (-1)*k76*(k12*x11*x51/k2 - k13*x12)/k76),
  Eq(Derivative(x12, t), (1*k76*(k12*x11*x51/k2 - k13*x12) + (-1)*k76*(k26*x25*x12 - k27*x26) + 1*k76*k52*x45)/k76),
  Eq(Derivative(x13, t), (-1)*k76*(k14*x13*x51/k2 - k15*x14)/k76),
  Eq(Derivative(x14, t), (1*k76*(k14*x13*x51/k2 - k15*x14) + (-1)*k76*(k30*x26*x14 - k31*x28))/k76),
  Eq(Derivative(x15, t), ((-1)*(k16*x15*x51/k2 - k17*x16) + (-1)*k76*(k56*x38*x15 - k57*x41) + (-1)*k76*k60*x15*x39 + (-1)*k76*k75*x52*x15)/k76),
  Eq(Derivative(x16, t), (1*(k16*x15*x51/k2 - k17*x16) + 1*k76*k73*x29 + (-1)*k76*(k33*x27*x16 - k34*x30) + 1*k76*k35*x30 + (-1)*k76*(k36*x16*x8 - k37*x31) + (-1)*k76*(k38*x6*x16 - k39*x32) + 1*k76*k40*x32 + (-1)*k76*(k50*x10*x16 - k51*x45) + 1*k76*k52*x45)/k76),
  Eq(Derivative(x17, t), (-1)*k76*(k18*x17*x51/k2 - k19*x18)/k76),
  Eq(Derivative(x18, t), (1*k76*(k18*x17*x51/k2 - k19*x18) + 1*k76*k69*x49 + (-1)*k76*(k71*x18*x20 - k72*x37))/k76),
  Eq(Derivative(x19, t), (-1)*k76*(k20*x19*x51/k2 - k21*x20)/k76),
  Eq(Derivative(x20, t), (1*k76*(k20*x19*x51/k2 - k21*x20) + (-1)*k76*(k71*x18*x20 - k72*x37))/k76),
  Eq(Derivative(x21, t), (-1)*k76*(k22*x21*x51/k2 - k23*x22)/k76),
  Eq(Derivative(x22, t), (1*k76*(k22*x21*x51/k2 - k23*x22) + 1*k76*k55*x43)/k76),
  Eq(Derivative(x23, t), (-1)*k76*(k24*x23*x51/k2 - k25*x24)/k76),
  Eq(Derivative(x24, t), (1*k76*(k24*x23*x51/k2 - k25*x24) + (-1)*k76*(k67*x48*x24 - k68*x49))/k76),
  Eq(Derivative(x25, t), ((-1)*k76*(k26*x25*x12 - k27*x26) + (-1)*k76*(k28*x25*x10 - k29*x27))/k76),
  Eq(Derivative(x26, t), (1*k76*(k26*x25*x12 - k27*x26) + (-1)*k76*(k30*x26*x14 - k31*x28) + 1*k76*k73*x29 + 1*k76*k35*x30 + (-1)*k76*(k58*x41*x26 - k59*x42))/k76),
  Eq(Derivative(x27, t), (1*k76*(k28*x25*x10 - k29*x27) + (-1)*k76*(k33*x27*x16 - k34*x30))/k76),
  Eq(Derivative(x28, t), (1*k76*(k30*x26*x14 - k31*x28) + (-1)*k76*k32*x28)/k76),
  Eq(Derivative(x29, t), (1*k76*k32*x28 + (-1)*k76*k73*x29)/k76),
  Eq(Derivative(x30, t), (1*k76*(k33*x27*x16 - k34*x30) + (-1)*k76*k35*x30)/k76),
  Eq(Derivative(x31, t), (1*k76*(k36*x16*x8 - k37*x31) + (-1)*k76*(k44*x31*x2 - k45*x35) + (-1)*k76*(k46*x31*x4 - k47*x36) + 1*k76*k49*x36)/k76),
  Eq(Derivative(x32, t), (1*k76*(k38*x6*x16 - k39*x32) + (-1)*k76*k40*x32)/k76),
  Eq(Derivative(x33, t), ((-1)*k76*(k41*x6*x33 - k42*x34) + 1*k76*k43*x34 + 1*k76*k49*x36 + (-1)*k76*k61*x33*x39 + (-1)*k76*(k65*x33*x47 - k66*x48) + (-1)*k76*k74*x52*x33)/k76),
  Eq(Derivative(x34, t), (1*k76*(k41*x6*x33 - k42*x34) + (-1)*k76*k43*x34)/k76),
  Eq(Derivative(x35, t), (1*k76*(k44*x31*x2 - k45*x35) + (-1)*k76*k48*x35)/k76),
  Eq(Derivative(x36, t), (1*k76*(k46*x31*x4 - k47*x36) + 1*k76*k48*x35 + (-1)*k76*k49*x36)/k76),
  Eq(Derivative(x37, t), ((-1)*k76*(k53*x37*x8 - k54*x43) + 1*k76*k55*x43 + 1*k76*(k71*x18*x20 - k72*x37))/k76),
  Eq(Derivative(x38, t), (-1)*k76*(k56*x38*x15 - k57*x41)/k76),
  Eq(Derivative(x39, t), ((-1)*k76*k60*x15*x39 + (-1)*k76*k61*x33*x39 + (-1)*k76*k70*x3*x39)/k76),
  Eq(Derivative(x40, t), 1*k76*k61*x33*x39/k76),
  Eq(Derivative(x41, t), (1*k76*(k56*x38*x15 - k57*x41) + (-1)*k76*(k58*x41*x26 - k59*x42))/k76),
  Eq(Derivative(x42, t), 1*k76*(k58*x41*x26 - k59*x42)/k76),
  Eq(Derivative(x43, t), (1*k76*(k53*x37*x8 - k54*x43) + (-1)*k76*k55*x43)/k76),
  Eq(Derivative(x44, t), 1*k76*k60*x15*x39/k76),
  Eq(Derivative(x45, t), (1*k76*(k50*x10*x16 - k51*x45) + (-1)*k76*k52*x45)/k76),
  Eq(Derivative(x46, t), (1*k76*(k62*x6*x4 - k63*x46) + (-1)*k76*k64*x46)/k76),
  Eq(Derivative(x47, t), (-1)*k76*(k65*x33*x47 - k66*x48)/k76),
  Eq(Derivative(x48, t), (1*k76*(k65*x33*x47 - k66*x48) + (-1)*k76*(k67*x48*x24 - k68*x49) + 1*k76*k69*x49)/k76),
  Eq(Derivative(x49, t), (1*k76*(k67*x48*x24 - k68*x49) + (-1)*k76*k69*x49)/k76),
  Eq(Derivative(x50, t), 1*k76*k70*x3*x39/k76),
  Eq(Derivative(x51, t), ((-100)*k76*(k1*x1*x51/k2 - k3*x2) + (-100)*k76*(k4*x3*x51/k2 - k5*x4) + (-100)*k76*(k6*x5*x51/k2 - k7*x6) + (-100)*k76*(k8*x7*x51/k2 - k9*x8) + (-100)*k76*(k10*x9*x51/k2 - k11*x10) + (-100)*k76*(k12*x11*x51/k2 - k13*x12) + (-100)*k76*(k14*x13*x51/k2 - k15*x14) + (-100)*(k16*x15*x51/k2 - k17*x16) + (-100)*k76*(k18*x17*x51/k2 - k19*x18) + (-100)*k76*(k20*x19*x51/k2 - k21*x20) + (-100)*k76*(k22*x21*x51/k2 - k23*x22) + (-100)*k76*(k24*x23*x51/k2 - k25*x24) + 100*k76*k49*x36)/k76),
  Eq(Derivative(x52, t), ((-1)*k76*k74*x52*x33 + (-1)*k76*k75*x52*x15)/k76),
  Eq(Derivative(x53, t), 1*k76*k74*x52*x33/k76),
  Eq(Derivative(x54, t), 1*k76*k75*x52*x15/k76) ]