$18+4.24$
$4\left(7-12\right)^2-5\left(4-7\right)^2$
$\lim_{x\to\infty}\left(\sqrt[f]{f}\right)$
$\left(-318\right)+\left(-146\right)+\left(189\right)$
$2x+3<3-x$
$x+1+4x+4$
$2x-\left(5x+3\right)=7-\left(3x-2\right)$
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