$\left(x+2y-3\right)\left(x+5+2y\right)$
$\left(\frac{a}{4\pi}\right)^{\frac{1}{2}}$
$\frac{1}{\left(1+\left(2x\right)^2\right)}$
$7x+5>19$
$90x^2+264x+126\:$
$\lim_{x\to-5}\left(\frac{10x^2+50x}{x^2-25}\right)$
$4x^2+12x+8$
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