$\sqrt{-9}+3\sqrt{-4}$
$a^3\:-\:3a^2b\:+\:4ab^2\:\:por\:\:a^2b\:-\:2ab^2\:+\:10b^3$
$y^2-5y+8=3y-8$
$-8\left(\:x\:-\:9\right)\:=\:32$
$\int_1^5\left(\frac{1}{4}e^{\frac{-x}{4}}\right)dx$
$cos\left(44\right)cos\left(14\right)+sin\left(44\right)sin\left(14\right)$
$\left(3^3\right)^2:\left(3^2.3^2\right)$
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