$\left(2x^2-\:3a\:\right)^2$
$v\:-\:18v$
$\left(4^3\right)\left(-4^4\right)$
$\left(5c-2d\right)^3$
$\frac{2}{3}\left(h+\frac{3}{4}\right)-\frac{2}{3}\left(h-\frac{3}{4}\right)$
$2z+3>1$
$x^2+bx+\frac{b^2}{4}$
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