Indefinite Integral of a Rational Function

$\frac{3x}{4} + \frac{15}{x^2} + C$

$\frac{x^2}{2} - \frac{5}{x} + C$

$\frac{x^2}{2} - \frac{5}{3x^3} + C$

$1 - \frac{10}{x^3} + C$