$-2x^3+2x^2+18x-18$
$\frac{\sec\left(a\right)^2}{1+\sec\left(a\right)}$
$\left(a-6b\right)\left(a+6b\right)$
$-\frac{1}{3}\cdot\left(-27\right)+7$
$x^2+18x+64$
$7x^2+5x^3y$
$f\left(x\right)=\frac{\left(8x^7-2\right)\left(\sqrt[3]{x^2}+x\right)}{x+1}$
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