$3x^{2}+5x-2$
$z^3z^2$
$\left(-4w^6y^{15}\right)^4$
$\left(1-\sin\right)\left(\sec x+\tan\right)=\frac{1-\sin^2x}{\cos x}$
$\left[-21+\left(17-15\right)-54\right]-\left\{-11\right\}$
$9q-9-q$
$\left(x^3-12x-4\right)^2$
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