$\int sin\left(8t\right)sec^2\left(cos\left(8t\right)\right)dt$

$q-6+15$

$\lim_{n\to\infty}\left(n.\sin\left(\frac{\pi}{n}\right)\right)$

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

$x^2-2x+1=3$

$\lim_{x\to\pi}\left(\frac{x}{2}\right)csc\left(x\right)$

$n2+6n+8$