$3+\left(x-1\right)\left(x+3\right)$
$a^{12}a^{-8}$
$\lim_{x\to\infty\:}\left(5xsin\left(\frac{8}{x}\right)\right)$
$y=\frac{\sin\left(2x\right)^2}{1-\sin^2\left(x\right)}$
$\left(c-4\right)\left(c-3\right)$
$3x-14<7x+2$
$\frac{x^3+4x^2-x-4}{x+4}$
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