$\sqrt{\frac{1}{x^3-2}}$
$4m^2+28+49$
$\frac{9\sqrt{xk}+3\sqrt{kt}}{4\sqrt{2k}-6\sqrt{3t}}$
$3^3.3^4$
$9z^2+36z+36$
$3x^2-x+5=2$
$x+86=47$
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