$\frac{dy}{dx}=0.65$

$\frac{du}{dt}=\left(1+u\right)\left(3+t\right)$

$\int\left(\sec^2\left(2ax\right)\right)dx$

$-24\:-\:34\:+\:76\:-\:28$

$\frac{x^6-x^6}{x+x}$

$\int\frac{5\sqrt{x^2-36}}{x^4}dx$

$\lim_{x\to0}\left(\frac{1-\cos\left(x\sqrt{cos2x}\right)}{x^2}\right)$