if (x.is_equal(s) && point.is_zero()) {
ex e = 1 / s - EulerGamma + s * (power(Pi, 2) / 12 + power(EulerGamma, 2) / 2) + Order(power(s, 2));
return e.series(s, point, order);
if (x.is_equal(s) && point.is_zero()) {
ex e = 1 / s - EulerGamma + s * (power(Pi, 2) / 12 + power(EulerGamma, 2) / 2) + Order(power(s, 2));
return e.series(s, point, order);