$y'\:+\:4y\:=\:3\:sen\:2x$
$4\cdot\left(10+4\right)+9^2$
$4\:\frac{7}{8\:}-2\:\frac{3}{4}$
$\left(12x+10\right)\left(2x+2\right)$
$\left(-5\right)\left(4\right)\left(-15\right)\left(-2\right)$
$\frac{2x^2+x}{2x^2-1}$
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