$9x+48=2x-22$
$2x-4y=-2$
$\left(m^2n-n^3\right)\left(m^2n+n^3\right)$
$\frac{du}{dx}=-x-u$
$\int\frac{5}{\sqrt{25-x^2}}dx$
$\left(-5\right)\:-\:\left(-19\right)$
$\left(7x^2-3y\right)\left(49x^4-21x^2y-9y^2\right)$
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