$x-4>2x+3$
$\log\left(3y\right)$
$2x^2+4z^2$
$7\left(4+2\right)^2-28$
$8x^2-x+3x-4x^2$
$3x^5-6x^5$
$\lim_{x\to\infty}\left(\frac{1+e^{-2x}}{1-e^{-2x}}\right)$
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