$x^2+10x+9$
$\int xe^{-6}dx$
$44a^2+26z+20az+48z^2+441a^2-25z^2$
$\frac{d}{dx}\left(wx\sin\left(y\right)-2x^2\sin\left(y\right)+x^2\sin\left(y\right)\cos\left(y\right)\right)$
$\int w\cos\left(w\right)dw$
$ab+ac^2$
$9k^2-16$
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