$3x^{2}+5x-2$
$m\frac{dy}{dx}=mg-kx^2$
$\int ( 9 ^ { x } + 1 ) ^ { 2 } d x$
$\int\sin\left(7z-2\right)dz$
$\lim_{x\to3}\left(\frac{x^3-3x^3+3x-9}{x-3}\right)$
$\frac{x^3-9^3}{x-9}$
$x^2-4x+13=0\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$
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