$\int \frac{72 \cos 8 x+3 x^{2}}{x^{3}+9 \sin 8 x} d x=$ কত?

$e 7 \cos 8 x+3 x^{2}+C$

$\log \left(x^{2}+9 \sin 8 x\right)+C$

$\cos 8 x \log \left(x^{3}+9 \sin 8 x\right)+C$

$\log \left(x^{3}+9 \sin 8 x\right)+C$