$\lim_{w\to0}\left(3w+2w^2w-w^2\right)$
$-2\:\int3\:\ln x\:dx$
$x \sqrt { x - 5 } + x$
$2x+2\le x+4$
$\sqrt{-\left(x^2+x-1\right)}$
$\left(-5x^2y-3f\right)\left(-5x^2y+2f^3\right)$
$-28-350\::\:7+8$
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