$sen^2\theta\:\:-\:2sen\theta\:\:+\:1$
$\int21xdx$
$-10x^2+7x+25\ge0$
$\left(\tan^2x+1\right)\left(\cos^2x+1\right)-\tan^2x$
$-m^7n^9+072m^7$
$5+\left(4-1\right)^2-2\cdot3+4^2$
$\lim_{x\to0}\left(\frac{x}{tan\left(\frac{x}{4}\right)}\right)$
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