$2y+3xy=5x$
$6\cdot\:\left(3\right)^2-\left(8\right)\left(3\right)+2$
$23^3-\:32^2\:+4$
$\left(315\right)\left(312\right)$
$\lim_{x\to2}\left(\frac{x^2-4}{4-\sqrt{18-x}}\right)$
$5^6\cdot4^6$
$8x^2+64=0$
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