$\left(a^7+b^7\right)\left(a+b\right)$
$4sin\left(\frac{\pi}{6}x\right)=3$
$\:\frac{x+8}{x^2-2x-8}$
$7x-2\left(2x+3\right)$
$\lim_{x\to0}\left(\frac{xlnx-\left(x-1\right)}{\left(x-1\right)\left(lnx\right)}\right)$
$6y''+y'-y=0$
$.348-.36$
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