$x^2+3x+2\:si\:x=2$
$\int x^{-69}dx$
$8b-64$
$\left(xy^3\right)^4$
$2b^2-8b^4$
$\frac{7}{\left(x^2+1\right)^2}$
$3x^5-27x^4+27x^3-27x^2+24x$
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