$2x^2-10x+12=0$
$x^2-12x+27=0$
$\left(10h+15k\right)^2$
$4m^{x-2}-10^{x-2}+3m^{x-2}$
$\left(\frac{2}{3}x-\frac{1}{4}y\right)^3$
$9xy+y+x-5+3yx$
$3x-5\:si\:x=-1$
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