$3x^2-18x-48$
$12x^2\:y-5x^2y$
$z\:2+\:z\:w\:+\:2\:z\:+\:2\:w\:+\:z\:+\:w$
$\lim_{x\to2}\left(1\right)$
$y=ln\:\left(x^3\sqrt{x^4+2}\right)$
$x^2+2x-49$
$w=x^2+y^2$
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