$x^5-2x^2+x$
$\left(a+12\right)\left(a-10\right)$
$\sin\left(\frac{5\pi}{2}+x\right)=\cos\left(x\right)$
$\frac{x^6-64}{x-3}$
$5z-4z$
$20x^2-148x+177$
$4y-5=3$
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