$\lim_{x\to4}\left(\frac{4x^2-64}{x-4}\right)$
$4\:\cdot36\cdot4$
$x\ln\left(x\right)y'+y=3x^3$
$9.077-6.8$
$\sqrt{16+9}+\:8$
$5+\left(-4\right)\cdot\left(7-\left(-3\right)\cdot\left(-2\right)\right)$
$11-\left(5+2\right)$
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