$x^{2\:}-14x-49$
$2y^2+12y+18$
$\frac{2}{a+1}+\frac{a+2}{a^2-1}$
$\lim_{x\to\infty}\:\frac{-2^{x+1}}{1-2^x}$
$\left(\frac{2}{3}x+\frac{1}{2}y\right)^3$
$\left(5x^3+7x^3y^4\right)^5$
$-3-\frac{4}{1}$
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