$\left(r^x+7\right)\left(r^x-10\right)$
$\left(x-5\right)\left(x-5\right)$
$-y+2+6y+2-10u+6u+u+9u$
$zq+9b-\frac{h}{2b}$
$\frac{dy}{dx}=-\frac{1}{2}e^{\frac{x}{2}}sin\left(5x\right)+5e^{\frac{x}{2}}cos\left(5x\right)+y$
$\left(n^2+\frac{7}{2}\right)\left(n^2-5\right)$
$8y+3y+4y$
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