$\int\frac{1}{x^{3}\sqrt{x^{2}-1}}dx$

$6x-2\left(x-3\right)$

$\int\left(\frac{\left(x^7\right)}{\sqrt{x^8-4}}\right)dx$

$x\frac{dy}{dx}+4y=2x^2$

$\lim\:_{x\to\:2}\left(\frac{cos\left(2\right)-1}{\left(x-2\right)^2}\right)$

$49\int x^6sec^4\left(x^7\right)dx$

$\left(3+5i\right)^4$