$\left(cotx+cscx\right)\left(tanx-senx\right)=tanx\cdot\:\:senx$
$-850.000+-800.000+-500.000+-220.000$
$\lim_{x\to\infty}\left(\frac{4x^3-2x^2+6}{\pi x^3+4}\right)$
$3x^2+12x+81=15$
$6x+1+7x$
$\tan2\cdot85.22$
$2x^2y+2x^2z+2x^22v$
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