$3^2+1^2$
$3xy^3+27x^4y$
$\left(m-9\right)\left(m+9\right)$
$3x+16y\:\left(\frac{dy}{dx}\right)=0$
$\frac{\cot^2x+1}{\cot x}$
$49m^2-64$
$48-\left(34-\left(11+27\right)-15\right)-8$
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