$\int \frac{\cos \left(\frac{1}{x}\right)}{x^{2}} d x=$ কোনটি?

$\cos \left(\frac{1}{x}\right)$

$\sin \left(\frac{1}{x}\right)$

$-\sin \left(\frac{1}{x}\right)$

$\cos \left(\frac{1}{x^{2}}\right)$