$\left(2+\sqrt{y}\right)\left(2-\sqrt{y}\right)\infty$
$2x^2+2x-4<0$
$\frac{b^2-49}{b+7}$
$g^4x-5g^4x^2-g^4x-3g^{-4}x^2$
$14-6s+14s+8$
$x+3x+2$
$\frac{\left(a^{6}\right)^{2}\cdota^{6}}{a^{10}}$
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