$14,7+10,5+2,1$
$\lim_{x\to\frac{\pi}{2}}\left(\frac{1}{x}\sec\left(x\right)\right)$
$\lim_{n\to\infty}\:-1^{2n+1}$
$8a-12a-0.75a$
$3^2+3^5+3^4$
$\frac{dy}{dx}\left(6x-2\right)$
$\tan^2\left(x\right)+9\tan\left(x\right)+6$
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