$\left(\frac{27x^3}{8}\right)^{\frac{2}{3}}$
$\frac{x^5-x^4+x^2-9}{x^2+1}$
$\tan\left(x\right)+\cos\left(x\right)\tan\left(x\right)+1$
$x^2-5z+\frac{25}{4}=4$
$-36x^2-72x+81$
$4y^4-12y^2+9$
$z^{12}-4$
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