$\frac{x^2-\sqrt{\:8x}}{\sqrt{2x\:}-2}$
$6xy+6x=6x^2$
$-47+25-36+548$
$\frac{3x^2+x-5}{x+2}$
$-34x^4y^5z^3\:+\:51x^3$
$4xy+8x+7y-7x+10\:y-7xy$
$\lim_{x\to5}\left(-4x^3-x^2-4x+5\right)$
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