$-3x^2+2x+1$
$-\frac{512}{64}$
$17x\:+\:87\:=\:342$
$\frac{\left(y^4\right)^2}{\left(y^3\right)^2}$
$\frac{x^2+4x-5}{x^2-2x-3}+\frac{2}{x+1}$
$64+2-\left(-2\right)+2$
$\left(-5\right)-\left(+2\right)-\left(-3\right)$
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