$1+1+1+0+20$
$a3-5a+1\:entre\:a+2$
$\left(-7x^2\right)\left(-5x^2\right)$
$\int_0^1\left(\frac{1}{x^{1-2p}}\right)dx$
$x^3-5x+7;\:x=-3$
$5x-8\le6x-12$
$x^2+4x-221$
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