$\lim_{x\to2}\left(\frac{x^3-3x^2+3x-9}{x-3}\right)$

$t^2xt$

$\frac{\sin\left(x\right)-\cos\left(x\right)+1}{\sin\:\left(x\right)+\cos\left(x\right)-1}=\sec\left(x\right)+\tan\left(x\right)$

$\left(2x^5\:+\:3y^4\right)^3$

$6p-11p-10$

$\int\left(3t\left(\sqrt{2+t^2}\right)\right)dt$

$\cos\left(x-\frac{\pi}{6}\right)=0,5$