$\lim_{x\to\frac{3,1416}{2}}\left(\frac{\tan\left(5x\right)}{\tan\left(3x\right)}\right)$
$5x^3-25x^2$
$20+\:20\:+\:11+\:64\:+\:64\:+64+\:64$
$\left(-9\right)\cdot\left(-3\right)\cdot3$
$17\sec\left(x\right)+17=0$
$2+\left(-1+5\right)-\left(3+8\right)$
$\left(x-y\right)\left(x+3y\right)$
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