$19x-\left(13x-x\right)$

$5x-3>2x+1$

$-3x^2\sqrt{x^2y^2}\left(x^2y^2\right)$

$\left(\sqrt{3}\tan\left(x\right)\sec\left(x\right)+2\tan\left(x\right)\right)^2=0$

$\left(-2+7\right)\left(3-9\right)$

$\lim_{x\to\frac{\pi}{2}}\left(\pi-2x\right)^{\cos\left(x\right)}$

$\int17\sec^4\theta\:\tan^2\theta\:d\theta\:$