$-5y^2+-2y^2$

$\lim_{x\to2}\left(\frac{3x^2+4x-1}{x^2-x-2}\right)$

$\left(2\right)^2-3\left(2\right)+2$

$\frac{p}{6}\:+\frac{2p}{3}$

$x^2-121=0$

$\frac{dy}{dx}in\left(x^2+y^2\right)$

$\left(1-\tan\left(x\right)\right)^2+\left(1+\tan\left(x\right)\right)^2=2\sec^2\left(x\right)$