$16x^2\:-\:4y^6\:\:$
$4+5^2$
$\frac{3x^2-2}{3x+2}\le-2$
$9x-9-8x-32$
$\cos2\left(x\right)\cos\left(x\right)-\sin2\left(x\right)\sin\left(x\right)=-\frac{\sqrt{3}}{2}$
$55d^2n^3f+110d^2n^3f^2-220d^2n^3$
$\frac{\left(2e^{2x}\right)}{5x-20}$
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