1 / -pi*I -pi*I | ------ ------ | 3 y 3 y 3 / pi*I\ | x + y e *e *gamma(1/3)*lowergamma(1/3, 0) e *e *gamma(1/3)*lowergamma\1/3, e / | e dx = - ---------------------------------------- + -------------------------------------------- | 9*gamma(4/3) 9*gamma(4/3) / 0