$\left(9b^3+d\right)^3$
$\left(3x^3-4y\right)^2$
$-2\left(1+a\right)$
$\left(x^2-2\right)\left(x^2+2x+4\right)$
$x^2-12x-9$
$-75-\left(-25\right)$
$\lim_{x\to0}\left(sec\:\left(x\right)\right)^{\frac{1}{x}}$
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