$8r^3+27$
$3x^2+1^2$
$72x^2+36y-27az$
$\cos\:\left(x\right)+\frac{\sin\:\left(x\right)}{\cot\:\left(x\right)}$
$\int x^4cosxdx$
$3^{-1}\cdot3^6$
$2x^4+3x^3-2x^2$
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