$\lim_{x\to3}\:\left(\frac{x^3-2x^2-8x}{x\sqrt{\left(x^2-16\right)}}\right)$
$\sec^213$
$2ax+1=3-a$
$\:\left(-8\right)-\left(-16\right)$
$\left(9a\:-\:3b\right)^3$
$\int\left(5-sin\left(\frac{t}{5}\right)^2\right)cos\left(\frac{t}{5}\right)dt$
$9x-2\left(2x+5\right)$
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