[ Eq(Derivative(x1, t), (1*k53*(k1 + 1/10*k50*k51*x2)*x1*(1 - k3*x1) + (-1)*k53*k4*x4*x1 + (-1)*k53*k5*x3*x1/((1 + k6*x6)*(1 + k7*k48*x1)))/k53),
  Eq(Derivative(x2, t), (1*k53*(1/10*k52 + k10*x1/(k11 + x1))*x2*(1 - k9*x2) + (-1)*k53*k12*x2)/k53),
  Eq(Derivative(x3, t), (1*k53*k13 + (-1)*k53*k14*x3 + (-1)*k53*k15*x3*x1 + 1*k53*k16*x4*x1 + 1*k53*k17*x5*x3/(k18*k44 + x5) + 1*k53*k19*x3*(k45*x3 + k46*x4 + k47*x5)/(k20 + k45*x3 + k46*x4 + k47*x5) + (-1)*k53*k21*x6*x3)/k53),
  Eq(Derivative(x4, t), (1*k53*k22 + (-1)*k53*k23*x4 + (-1)*k53*k24*x4*x1 + 1*k53*k25*x5*x4/(k26*k44 + x5) + 1*k53*k27*x4*(k45*x3 + k46*x4 + k47*x5)/(k28 + k45*x3 + k46*x4 + k47*x5) + (-1)*k53*k29*x4)/k53),
  Eq(Derivative(x5, t), (1*k53*k30 + (-1)*k53*k31*x5 + 1*k53*k32*x5*x5/(k33*k44 + x5) + 1*k53*k34*x5*(k45*x3 + k46*x4 + k47*x5)/(k35 + k45*x3 + k46*x4 + k47*x5) + (-1)*k53*k36*x6*x5)/k53),
  Eq(Derivative(x6, t), (1*k53*k37 + (-1)*k53*k38*x6 + 1*k53*k40*x5 + 1*k53*k39*x3 + 1*k53*k41*x5*x6/(k42*k44 + x5) + (-1)*k53*k43*x4*x6)/k53) ]