$s^2+16+64$

$w^2-8w+13$

$\lim_{x\to\infty}\left(\frac{4+x-2x^3}{2x^2-3x+11}\right)$

$\int\frac{sin\:x}{cos^4\:x}\:dx$

$cot\left(2\right)x\:+\:cot\left(4\right)x\:=\:csc\left(4\right)x\:-\:csc\left(2\right)x$

$x^2+4x-1020$

$\lim_{x\to\infty}\left(\frac{x+sin\left(x\right)}{x-sin\left(x\right)}\right)^{2x}$