$\frac{d}{dx}2x^3-24x$

$\lim_{x\to2}\frac{x^2+11x-18}{x-2}$

$\int\frac{\left(36x^2-18\right)}{4x^3-3x-1}dx$

$\lim_{x\to0}\left(\frac{hx}{e^{hx}-1}\right)$

$\int\left(\:cos\:7x\right)dx$

$m+0.47m-0.4$

$-\frac{cos\left(x\right)}{sec\left(x\right)}-sin^2\left(x\right)$