$x+4x+2$
$y^2-3y=9$
$\left(-3y+2\right)^2$
$\frac{x^2+3x}{2}$
$\left(2x+5x^2\right)^8x$
$\left(4x^3y-5z\right)\left(4x^3+5z\right)$
$\frac{x-5}{8-2x}$
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