$\sqrt[3]{8a^6}b^{-3}$
$\left(\sec\left(a\right)^2-1\right)\left(\sec\left(a\right)^2+1\right)$
$9a+\frac{7}{9}<0$
$0.25^7$
$3ax^2-27y^3$
$2x^2+y^2-7=0$
$7v+6g+4v$
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