$\left(3^4+1\right)$
$\int\frac{8}{x\sqrt{x^2+4}}dx$
$-6\left(3x-9y-10\right)$
$4x=7y-3$
$\left(7x+4\right).\left(7x-4\right)$
$18-2x>4$
$\lim_{x\to0}\left(\frac{x\sin\left(x\right)}{\cos\left(x-1\right)}\right)$
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