$\frac{12x^3+13x^2-59x-30}{4x-5}$
$\lim_{x\to0}-\left(\frac{1}{x^2}-\frac{1}{x}\right)$
$\frac{\left(x^2-40x-65\right)}{x^2-25}\:-\:\frac{\left(4x+4\right)}{x+5}$
$2\left(x+2\right)>7$
$\lim_{x\to-4}\left(\frac{3x}{2x+8}\right)$
$\frac{d}{dx}x^2+1$
$\int\:4x^2\:e^x\:\:dx$
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