$8-10^2$
$\frac{-1^2+1}{-1^2+\left(-1\right)-2}$
$\frac{x^5-2x^3+x^2-1}{x-2}$
$2a^2+a=1$
$x+3\left(3x^4+7x^3+2x^2-2x-1\right)$
$\frac{4x^3y^2}{3x^2}$
$\left(\frac{3\sqrt{2}}{a}+4x\right)^2$
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