$\frac{2}{2}+\:\sqrt{2+2}$
$-2-3-5-7-9-11-13-15$
$\lim_{x\to\infty}\left(\frac{6x^2+3}{3x^2-x-12}\right)$
$2n-6n$
$\left(xz-yw\right)\left(xz+yw\right)$
$12g^2+36gm+27g^2$
$4y^2\:=0$
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