$3\left(x+1\right)-3\left(x-2\right)<x+6$
$\left(-20\right)+\left(-x\right)=59$
$\left(2x-\sqrt{5}\right)\left(3x+\sqrt{5}\right)$
$x-16x$
$\frac{d}{dx}-2x+2$
$100x^4-220x^2y+12y^2$
$\lim_{x\to0}\left(\frac{2\:cos\:x+2}{\left(x-\pi\right)^2}\right)$
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