$4x^2+11x-20$
$\int\frac{xe^2}{\left(x+1\right)\:^2}dx$
$12x^2-19x+4$
$\frac{49y^4-16}{7y^2-4}$
$2x^2-4x-96$
$\left(-4uv^3\right)\left(3u^2\right)$
$25x^3\:+\:15x^4y\:entre\:5x$
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