$\lim_{x\to4}\left(\frac{x-4}{\left|x^2-16\right|}\right)$
$\frac{x^7}{x^{14}}$
$2x+5>17$
$\lim_{x\to\infty}\left(\sqrt{x^2+7x+2}-x\right)$
$1029-65-12-28$
$5\left(2y+6\right)-12y$
$\left(x^3+9\right)\left(x^3+1\right)$
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