$2'=5$
$7^3\cdot16^{-9}$
$6a^2-48a-120$
$9^2+12x+4$
$\sec^2\left(a\right)=1+\tan^2\left(a\right)$
$\left(\frac{2x^{2}y^{-2}}{x^{0}y^{0}\cdotx\cdotxy^{2}}\right)^{-2}$
$f\left(x\right)=\frac{3}{2-8x}$
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