[ Eq(Derivative(x1, t), (1*k42*13*Piecewise((k14*Piecewise((0, And(Eq(k71*1/2*k18*x7, 0), Eq(k72*(x22 + k15), 0))), (2*k72*(x22 + k15)*k78/k14/(k71*1/2*k18*x7 - k72*(x22 + k15) + k71*1/2*k18*x7*k77/k14 + k72*(x22 + k15)*k78/k14 + sqrt((k71*1/2*k18*x7 - k72*(x22 + k15) + k71*1/2*k18*x7*k77/k14 + k72*(x22 + k15)*k78/k14)**2 - 4*(k71*1/2*k18*x7 - k72*(x22 + k15))*k72*(x22 + k15)*k78/k14)), True))/k14, Eq(k20, 1)), (1, True)) + (-1)*k56*x1 + (-1)*k74*x2*x1)/k95),
  Eq(Derivative(x2, t), (1*k11*k16*(x12 - x3 - x4 - x5 - x2)*(x1 - x2) + (-1)*k11*k17*x2)/k95),
  Eq(Derivative(x3, t), (1*k11*k16*(x12 - x3 - x4 - x5 - x2)*(k12 - x3 - k18*x6) + (-1)*k11*k17*x3)/k95),
  Eq(Derivative(x4, t), (1*k11*k16*(x12 - x3 - x4 - x5 - x2)*(x13 - x4) + (-1)*k11*k17*x4)/k95),
  Eq(Derivative(x5, t), (1*k11*k16*(x12 - x3 - x4 - x5 - x2)*(k13 - x5 - k18*x7) + (-1)*k17*k11*x5)/k95),
  Eq(Derivative(x6, t), (1*k11*k94*(k12 - x3 - k18*x6)**k18 + (-1)*k11*k17*x6)/k95),
  Eq(Derivative(x7, t), (1*k11*k94*Piecewise((x1 - x2, Eq(k75, 1)), (1, True))*(k13 - x5 - k18*x7)**k18 + (-1)*k11*k17*x7/(1 + k21*(x1 - x2)))/k95),
  Eq(Derivative(x8, t), (1*k37*(k22 + k30*x15)/(k24 + k22 + k30*x15) + (-1)*k50*x8 + (-1)*1/2*k35*(x8 + 1/2*k18*x6 + k36 - sqrt((x8 + 1/2*k18*x6 + k36)**2 - 4*x8*1/2*k18*x6)))/k96),
  Eq(Derivative(x9, t), (1*1/2*k35*(x8 + 1/2*k18*x6 + k36 - sqrt((x8 + 1/2*k18*x6 + k36)**2 - 4*x8*1/2*k18*x6)) + (-1)*k51*x9)/k96),
  Eq(Derivative(x10, t), (1*k43*x9 + (-1)*k57*x10)/k96),
  Eq(Derivative(x11, t), (1*k38*(k23 + k29*x10 + k31*x15)/(k25 + k23 + k29*x10 + k31*x15) + (-1)*k52*x11)/k96),
  Eq(Derivative(x12, t), (1*k44*x11 + (-1)*k58*x12)/k95),
  Eq(Derivative(x13, t), (1*k45*k66 + (-1)*k59*x13 + (-1)*k69*(x13 - x4) + (-1)*k73*x17*x13)/k95),
  Eq(Derivative(x14, t), (1*k69*(x13 - x4) + (-1)*k60*x14 + (-1)*k70*x14)/k97),
  Eq(Derivative(x15, t), (1*k70*x14 + (-1)*k61*x15)/k96),
  Eq(Derivative(x16, t), (1*k39*x15/(k26 + x15) + (-1)*k53*x16)/k96),
  Eq(Derivative(x17, t), (1*k46*x16 + (-1)*k62*x17)/k95),
  Eq(Derivative(x18, t), (1*k47*k68/(1 + (k14*Piecewise((0, And(Eq(k71*1/2*k18*x7, 0), Eq(k72*(x22 + k15), 0))), (2*k72*(x22 + k15)*k78/k14/(k71*1/2*k18*x7 - k72*(x22 + k15) + k71*1/2*k18*x7*k77/k14 + k72*(x22 + k15)*k78/k14 + sqrt((k71*1/2*k18*x7 - k72*(x22 + k15) + k71*1/2*k18*x7*k77/k14 + k72*(x22 + k15)*k78/k14)**2 - 4*(k71*1/2*k18*x7 - k72*(x22 + k15))*k72*(x22 + k15)*k78/k14)), True))/k76)**k19) + (-1)*k63*x18)/k96),
  Eq(Derivative(x19, t), (1*k40*(k32*x18 + k34*x15)/(k27 + k32*x18 + k34*x15) + (-1)*k54*x19)/k96),
  Eq(Derivative(x20, t), (1*k48*x19 + (-1)*k64*x20)/k96),
  Eq(Derivative(x21, t), (1*k41*k33*x20/(k28 + k33*x20) + (-1)*k55*x21)/k96),
  Eq(Derivative(x22, t), (1*k49*x21 + (-1)*k65*x22)/k96),
  Eq(Derivative(x23, t), (1*k79/(1 + k81*x20) + (-1)*k80*x23)/k98),
  Eq(Derivative(x24, t), (1*k84*k83 + 1*k85*(x25 - x27)*k83 + (-1)*k84*x24 + (-1)*k85*(x25 - x27)*x24 + (-1)*k86*x24)/k98),
  Eq(Derivative(x25, t), (1*k89 + 1*k90*k82*x20 + (-1)*k91*x25)/k96),
  Eq(Derivative(x26, t), (1*k87*(x24 - x26)*(x23 - x27 - x26) + (-1)*k88*x26 + (-1)*k86*x26)/k98),
  Eq(Derivative(x27, t), (1*k92*(x25 - x27)*(x23 - x27 - x26) + (-1)*k93*x27 + (-1)*k91*x27)/k98) ]