$\lim_{x\to\infty}\left(\frac{e^{3x}-1}{2x^2+11x}\right)$
$x^2+82x-9$
$-12\:\cdot28$
$4x^2-5x+1\ge10x-2x^2-5$
$3^3a^3-b^3$
$\left(1+2x\right)^{-\frac{3}{2}}$
$2-8+70$
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