$\int x\sec^2\left(\frac{x}{a}\right)dx$
$\frac{\left(4x^6-256x^3\right)}{\left(2x^3-8x^2\right)}$
$\left(4^3\right)^{-3}$
$5\cos\left(x\right)+12=-3\cos\left(x\right)+20$
$\left(x-3\right)\left(x+6\right)$
$-3^3+-2\left(6\left(-3\right)-18\left(-2\right)\right)$
$9x^2-12x-12$
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