$\int\frac{tan^4\left(x\right)}{\sec^5\left(x\right)}dx$
$y+1\left(y-2\right)$
$\lim_{x\to\infty}\left(\frac{4}{x^2+x}\right)$
$\frac{x^2-\pi^2}{x^2}$
$-6x\:-\:67\:-\:4x\:=\:73$
$4\left(39\right)$
$\frac{\sqrt{9}-3}{9-9}$
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