$34,\:572+19,\:39$
$4a^{12}-9b^6$
$\left(4x^2-2\right)\left(3x+2\right)$
$-3\left(4\right)+\left(5\right)\left(-2\right)$
$x7:x$
$\lim_{x\to0}\left(\frac{1-t\cos\left(x\right)}{x^2}\right)$
$6x-3y+3x+5y+2$
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