$y^2-10y$
$\lim_{x\to\infty}\left(\frac{2sen\left(x\right).\cos\left(x\right)}{x^2}\right)$
$8y-4xy+2y+10x$
$-8x^2+56x^2+x-7$
$\left(2x^2+3a\right)\left(2x^2-3a\right)$
$19^2y^2$
$8a^5-18am^4$
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