$\frac{\sqrt{x^2-20}+22x}{x}$
$\int\left(\frac{x^5-x+1}{x^2}\right)dx$
$16a^2-b^4$
$2-6\left(5t+4\right)$
$\cos^2x=\frac{3\left(1-\sin x\right)}{2}$
$\frac{\left(x^4-16\right)}{x-2}$
$\left(x^2\right)\left(+4\right)\left(-4\right)$
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