$y'+2y=6x^2\:$
$1.9+\left(-8\right)$
$\log\left(x^2-1\right)-\log\left(x+2\right)=2$
$\left(2x^2-5x+3\right)^2$
$\sqrt{4+4x^2}$
$-2\cdot\left(-5+\left(5-1\right)\right)\cdot\left(-3\right)$
$3\left(0\right)^2-5+2$
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