$\frac{1-\sqrt{x}}{\sqrt{x}}$
$\lim_{x\to0}\left(\frac{x^3-sin\left(x\right)}{x^5}\right)$
$10x+6>12x-4$
$4y^2\:=0$
$\frac{-\cos^2\left(a\right)+1}{\sin^2\left(a\right)}-\frac{1}{\cos^2\left(a\right)}$
$239\cdot128$
$\frac{x^a}{x^2}$
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