$\frac{4x^3+8x^2+3x-4}{\:2x^2-x-1}$
$x^2-1.2x+0.360$
$5x^2+x+6+x^2-2x+1$
$24-5\left(-6+3\right)$
$10.791+2715$
$-5\left(3-2x\right)$
$2sen^2x\:=\:tagx$
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