$8x^2-30x-27=0$
$e+x=e^2x$
$\left(5x-10^2\right)$
$\left(2x^4-3x\right)^3$
$\frac{4zx^{\:3}y^{-1}}{3x^0y^{-2}z^4\cdot3yx^4z^0}$
$4+\frac{6}{2}$
$2\cos\left(\frac{x}{4}\right)^2-3\cos\left(\frac{x}{2}\right)=0$
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