$ax^2-ax-2a$
$\int_{-1}^1e^{-2x}dx$
$5\left(x-2\right)\left(x+2\right)$
$\frac{3x^2-2x-8}{x^2+2}$
$-6=\frac{x}{2}-10$
$-12,43+7,41$
$x^2+4x-1=0$
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