$7w+5-3w-15+2z$
$\frac{dy}{dx}=\left(2\cdot x^2+4\right)\cdot y+3\cdot x^2+6$
$x^2<3$
$\left(-4\right)\left(-3\right)+7\left(-4\right)$
$\sqrt{z+1}=-8$
$-\frac{72}{-36}$
$-20y^2+9y+20$
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