$20y^2-y-4$
$12x^3y^3z+6x^3y^3z$
$\left(x+\frac{3}{5}\right)^3$
$2\left(\sqrt{x}\sin\left(\sqrt{x}\right)+\cos\left(\sqrt{x}\right)-1\right)$
$\arctan\left(e^0\right)$
$\lim_{x\to0}\frac{\tan\left(2x\right)}{\tan\left(\pi x\right)}$
$20\left(12a-8\right)+30$
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