$x+x+4x$
$x+3y=25$
$\left(x-n\right)\left(x^2\:+xn+n^2\right)$
$40+3+2$
$\frac{dy}{dx}\left(\frac{\left(\sqrt{x}\right)}{2}-\frac{2}{\sqrt{x}}\right)$
$4c+8-3c+1$
$7x+2y+9y+6z+5+y+32-6+-5+8x-3y$
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