$\lim_{x\to\infty}\sqrt{x^2+5x}-x$
$x^{-9}-3\left(x^{-3}-10\right)$
$\frac{d^3}{dz^3}\left(x^ay^bz^c\right)$
$12.\left(-3\right)-5.\left(-4\right).\left(-1\right).\left(-2\right)$
$5^{-3}\cdot25^{-3}\cdot\left(5^{-1}\right)^{-3}$
$x^2+\:2xy$
$\frac{x}{-5}-5<2$
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