$\int (3\cos(x) - \frac{1}{x^3}) dx$ belirsiz integrali aşağıdakilerden hangisidir?
A) $3\sin(x) + \frac{1}{2x^2} + C$
B) $-3\sin(x) - \frac{1}{2x^2} + C$
C) $3\sin(x) - \frac{1}{2x^2} + C$
D) $3\sin(x) + \frac{1}{4x^4} + C$
E) $3\sin(x) - \frac{3}{x^4} + C$
