$y^{2}-9y+14$
$\frac{1+\tan\:^2\left(80\right)}{\sec\:2\left(80\right)}=1$
$\lim_{x\to4}\left(\frac{x^{2}-15}{x^{2}-16}\right)$
$2b-5b$
$\sqrt[1]{256}$
$2\sin\left(\frac{v}{2}\right)\cdot\cos\left(\frac{2x+v}{2}\right)$
$\int\frac{5x^2-2x+64}{x^3-16x}dx$
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