$\left(9m+10\right).2$
$\left(x^2y-\frac{2}{3}\right)^2$
$-\left|-3+2\right|$
$\left(4+\sqrt{5}\right)\left(4-\sqrt{5}\right)$
$2x^2+5=23$
$\frac{x}{2}+4>1$
$2x^2-12x+14=3x^2-20x+21$
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