[ Eq(Derivative(x1, t), (-1)*k14*k1*x2*x1/k14),
  Eq(Derivative(x2, t), ((-1)*k14*k1*x2*x1 + 1*k14*k2*x3 + (-1)*k14*k7*k9*(k10 + (1 - k10)*(1 - exp(-t/k11)**3))*x2 + 1*k14*k4*x4)/k14),
  Eq(Derivative(x3, t), (1*k14*k1*x2*x1 + (-1)*k14*k2*x3 + (-1)*k14*k5*k7*x3*x6 + 1*k14*k6*x5 + (-1)*k14*k7*k9*(k10 + (1 - k10)*(1 - exp(-t/k11)**3))*x3)/k14),
  Eq(Derivative(x4, t), (1*k14*k7*k9*(k10 + (1 - k10)*(1 - exp(-t/k11)**3))*x2 + 1*k14*k7*k9*(k10 + (1 - k10)*(1 - exp(-t/k11)**3))*x3 + 1*k14*k9*(k10 + (1 - k10)*(1 - exp(-t/k11)**3))*x5 + (-1)*k14*k4*x4)/k14),
  Eq(Derivative(x5, t), (1*k14*k5*k7*x3*x6 + (-1)*k14*k6*x5 + (-1)*k14*k9*(k10 + (1 - k10)*(1 - exp(-t/k11)**3))*x5)/k14),
  Eq(Derivative(x6, t), (-1)*k14*k5*k7*x3*x6/k14),
  Eq(Derivative(x7, t), (1*k14*k7*k9*(k10 + (1 - k10)*(1 - exp(-t/k11)**3))*x3 + 1*k14*k9*(k10 + (1 - k10)*(1 - exp(-t/k11)**3))*x5 + (-1)*k14*k8*x7)/k14) ]