$-3x^2-2x-5\:\:\:\:\:\:para\:x=2$
$\int^3\sqrt{2x+4}dx$
$\left(4x^{-4}y^8\right)^{-2}$
$\ln\left(\sqrt{4-x^2}\right)$
$2a\:-\:3b\:.\:2a\:+3b$
$-\left(-3\right)^3-\left(2\right)^3+16$
$35\sqrt{2}-3\sqrt{18}$
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