$\:16a^2-\:24ab\:+\:9b^2$
$\left(-2x^{-3}y^5z^4\right)^{-2}$
$\sqrt{\frac{x^2-9}{x}}$
$m^2-30m+10$
$x-3<3x+6$
$y=3x^2-3x;\:x=3$
$6+v+45$
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