$p^2-2p-15$

$\tan\left(x-\frac{3\pi}{4}\right)=\frac{-\sin\left(x\right)-\cos\left(x\right)}{-\cos\left(x\right)+\sin\left(x\right)}$

$\int\frac{cos^3\left(x\right)}{sen^2\left(x\right)}dx$

$10\left(5+3\right)$

$\lim_{x\to\infty}\left(\frac{1}{6}x^3\right)$

$\frac{dy}{dt}-\frac{y}{t}=tsin\left(t\right)$

$x^2=77$