$\left(\sqrt{2}x^2-\sqrt{2}y^2\right)^2$
$\frac{1}{25-sin^2x}$
$2x-8\ge9x-70$
$16-40b+25b$
$x^2-3x+8>0$
$2^4a^3$
$-16v^2+72>25$
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