$\frac{4x^2}{2x^3}$
$\frac{cos\left(u\right)+1}{sin\left(u\right)}+\frac{sin\left(u\right)}{1+cos\left(u\right)}$
$2x-7\ge5$
$3x^2-18x+35$
$\frac{d}{dx}\sqrt{3x^2-3x-2}$
$4c+5d-c-d$
$sin\left(x+\frac{\pi}{4}\right)+sin\left(x-\frac{\pi}{4}\right)$
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