$v-w=13$
$\frac{15p^{-4}q^{-6}}{-20p^{-12}q^{-3}}$
$x+2=3x-8$
$y=\left(\sqrt{2}\right)^2+\left(\sqrt{2}\right)^2$
$1^2-4\cdot4+3$
$\lim_{x\to2}\left(1.5\left(x-2\right)\right)$
$\frac{x}{x+2}-\frac{4}{x-2}$
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