$\lim_{x\to3}\left(\frac{\sqrt{x-7}-2}{x+3}\right)$
$\int\left(\frac{x^2+x-8}{x^3-4x}\right)dx$
$\lim_{h\to1}\frac{5\sqrt{x+h}-5\sqrt{x}}{h}$
$\left(a^8\right)^2$
$\frac{-3x^2+27}{-x+5}$
$\frac{4}{3}-3x<2x-6$
$x^2x^{11}$
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