$4x\:+\:8xy\:+17x\:-50x$
$\lim_{x\to1}\left(\frac{x^3-1}{\sqrt[3]{x-1}}\right)$
$7-10-5-4+6-1$
$40x^5-1080x^2y^6$
$-12-0.\left(-2\right)$
$r\left(r+8\right)=0$
$x^4-9z^2$
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