$\lim_{x\to\infty}\left(\frac{x^5+x+4}{x^2+7}\right)$
$2x^m\sqrt{a^{-3}}\cdot x^m\sqrt{\frac{1}{a^3}}$
$3\cdot\left(\frac{1}{2}a+b\right)-3b$
$4\left(3y-2\right)^2-9\left(y-1\right)$
$\sqrt{\left(4\right)^2-1}$
$4-2x>10-5x$
$\frac{1}{2}+\frac{-8}{16}$
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