$\lim_{x\to\infty}\left(\frac{3x}{\sqrt{x^2}}\right)$
$\int\frac{69}{x^2\sqrt{x^2+64\:}}dx$
$\frac{5x+7}{8}+\frac{6x-3}{8}$
$\int\left(\frac{cosx}{1-cosx}\right)dx$
$x^3+7x^2+9x+63$
$3x-7>2$
$x^{-2}-9<0$
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