Indefinite Integration

$\frac{-4}{7} \tan ^{\frac{-4}{7}} x+c$, where $c$ is a constant of integration.

$\frac{4}{7} \tan ^{\frac{4}{7}} x+c$, where c is a constant of integration.

$\frac{-7}{4} \tan ^{\frac{-4}{7}} x+c$, where c is a constant of integration.

$\frac{7}{4} \tan ^{\frac{4}{7}} x+c$, where c is a constant of integration.