$x^2+8x-3=0$
$\left(2x^3y-5z^m\right)^3$
$x=9x^3+3y^2$
$2x^2\left(9x^2-16\right)$
$\left(\frac{\sqrt{2}}{2}_+\frac{\sqrt{2}}{2}i\right)^2$
$\lim_{x\to\pi}\left(\frac{cos2x-sin2x-1}{\pi^3-x^3}\right)$
$2x-6=x^2+14x+49$
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