$\lim_{x\to-\frac{\pi}{2}}\left(\frac{cos\left(x\right)}{x+\frac{\pi}{2}}\right)$
$5p^2+p^2$
$1\:+12x\:+36x^2$
$10ab^2-2ab+7b^2$
$3\left(3x^2+2x\right)+5$
$3\cdot\:\frac{1}{3}^2+4+4\cdot\:\frac{1}{4}^2+6$
$\lim\:_{x\to\:\:4}\left(\frac{x^2-5x-14}{x^2-2x-8}\right)$
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