$\left(x-3\right)^{2\:}-\left(x-1\right)^{2\:}=4$
$\left(1-12m\right)^2$
$5a^2b-7ab^2$
$-120-\left(-123\right)$
$\int in4ydy$
$7x+9y+5-8x-10y-6$
$7\cdot3-15:5+5-8$
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