$4m^2-121$
$x^2-16x+8$
$\left(\left(\frac{45.33}{45.33}\right)-1\right)\cdot100$
$7\left(3n\right)$
$xy=c$
$\frac{\left(3x^2\right)^2}{x^5}$
$3x^2y-15x$
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