$-b-5b-8b$
$y^2-4x^2+40x-104=0$
$120\cdot3$
$\left(m+n^4\right)^2$
$\left(r-5\right)\left(-6r+11\right)$
$\int\frac{2x^2-x+9}{\left(x^2+9\right)^2}dx$
$\frac{d}{dx}\left(x\sqrt{x^2+25}\right)$
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