$\lim_{x\to\infty}t\:\sin\left(\frac{1}{t}\right)$

$x:90.000<\:700.000$

$\frac{x^5-x^4+x^2-2}{x^2+1}8$

$\frac{d}{dx}\sqrt[2]{\frac{x^2-1}{x-4}}$

$\frac{x^4}{x^3}$

$\left(\left(1-\cos\left(x\right)\left(1+\sec x\right)\right)\right)$

$\int\frac{\cos c^2}{\cot g^3}dx$