$\frac{2x^4-4x^3+8x^2-12x}{x^2}$
$x^2+8x=8$
$\frac{-105x^3}{3x^4}$
$12m^2-5m-2=0$
$9a^2b^7^0$
$sin\left(60\right)-cos\left(60\right)=cos\left(60\right)-sin\left(60\right)$
$2\left(2x+8\right)=20$
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