$\frac{x}{y}\:\left(z+w\right)$
$1-\sen^{2}x=\frac{1-\tan^{2}x}{1+\tan^{2}x}$
$539.20+-274.78$
$\lim_{x\to\infty}\left(\frac{x}{1+x}\right)$
$n3\:+512$
$3x+5=x+7$
$-5-\left(-1\right)-6\left(-3\right)$
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