$\left(4x^2-1\right)^44$
$9a^5b-12a^2b^3+15ab^2-18a^3b^4$
$\left(2x^2+3\right)x\left(2x^2-6\right)$
$5+3z+8$
$tan^2\left(2x\right)=1$
$\frac{x}{\sqrt{x-7}}$
$\left(2a+b\right)\left(a^2-b\right)$
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