$\frac{5-x}{x^2+10+25}$
$6\cos\left(2x\right)\:-\:3\:=0$
$z^2+7z+12$
$\sqrt{x},\:en\:x=4$
$\frac{10x^3-8x^2+25x-1}{5x^2}$
$70x^2+12x+16$
$\int\sin^3\left(8x\right)\cos^2\left(8x\right)dx$
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