$\frac{2a}{a-1}=2+\frac{5}{2a}$
$\int\frac{1}{2}\:dz$
$-19-90+-47+-18$
$\frac{\left(16-3x^2\right)}{x^2}$
$x^2-2x=12-x^2$
$\frac{40}{5}+\frac{10}{5}-\frac{5}{5}$
$-5\left(-3w^2+5-3y^3\right)$
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