$5+1+100+1+5$
$\left(\frac{x^2+1}{x^4}\right)^2$
$x^2+8x+11=0$
$a^6-x^6$
$\left(3x+3\right)\cdot\left(3x-2\right)$
$\lim_{x\to+\infty}\frac{x+4}{3x^2-5}$
$\lim_{x\to10}\frac{10x}{2x+5}$
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