$\lim_{x\to b}\left(\frac{\tan\left(x\right)-\tan\left(b\right)}{x-b}\right)$
$3x^2-10x-7$
$n^2+4n-59=0$
$-14\cdot10$
$\lim_{x\to0}\left(\frac{\sin\left(x\right)}{\tan\left(x\right)+1}\right)$
$-4a^2b^3+2ab^4$
$\left(\frac{2}{3}x-\frac{1}{4}y\right)^3$
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